Resilient Bars in RWAR construction, worth it or not?

Hi! I'm new here and finding my way in the world of acoustic insulation as in the process of
insulating a garage/outbuilding to make it a suitable percussion practice space. I would be so grateful if anyone could offer thoughts/experience on the following.
We are trying to keep the costs reasonable and working with a general builder friend on this project. Our priority is to reduce sound transmission to the extent where I won’t annoy the neighbours and also won’t be constantly advertising all the valuable gear I’m keeping in there! We are talking drum kit, timpani, xylophone etc… high and low frequencies. I don’t have any technical acoustic figures we are aiming for, but proximity of neighbours is as you would expect for a London street - houses about 5m away on two sides and a c.10m gap between our outbuilding and our next-door neighbours (not a party wall but the roof is joined with ridge tiles). Nobody lives in next door’s outbuilding but it’s the sort of area where that could be a possibility in future…legally or otherwise!
The original outbuilding is essentially like a freestanding garage, brick construction on the outside with small cavity (empty or inconsistently filled we think) and a breeze-block inner wall, which has a layer of 15mm acoustic plasterboard attached to it. It has a pitched roof with rafters infilled with rockwool and 15mm acoustic plasterboard attached directly to the rafters.
We now have a completely freestanding studwork RWAR structure inside the building. It’s about 5mx4m floor area. This has been built on a floating floor and all studwork is infilled with 100mm rockwool and lined with 5mm of mass loaded vinyl. It's due to be finished with plasterboard in the next couple of days and I'm not sure whether to get the boards mounted straight onto the stud work of walls and ceiling, or use resilient channels. The current level of insulation when we've tested it is definitely headed in the right direction in terms of reducing sound transmission, and I'm not sure whether using resilient channel is enough of a necessity to warrant the extra expense and loss of space inside the room, but I need to make a quick decision. There seem to be a number of different opinions about the merits of using RC on an already decoupled structure and it's hard to discern who is just out to sell me stuff!
Then there are the different type of RCs…Some that mount onto a rubber clip system (such as Isomax), presumably most effective, but £££, and I’m not sure we’re far enough off the desired result in terms of sound reduction to justify the cost. More basic RCs that mount directly onto studs could be an option but I'm not clear if they are likely to make a significant difference to be worth the bother.
Would love to hear from anyone who has a pearl of wisdom! Very many thanks.
insulating a garage/outbuilding to make it a suitable percussion practice space. I would be so grateful if anyone could offer thoughts/experience on the following.
We are trying to keep the costs reasonable and working with a general builder friend on this project. Our priority is to reduce sound transmission to the extent where I won’t annoy the neighbours and also won’t be constantly advertising all the valuable gear I’m keeping in there! We are talking drum kit, timpani, xylophone etc… high and low frequencies. I don’t have any technical acoustic figures we are aiming for, but proximity of neighbours is as you would expect for a London street - houses about 5m away on two sides and a c.10m gap between our outbuilding and our next-door neighbours (not a party wall but the roof is joined with ridge tiles). Nobody lives in next door’s outbuilding but it’s the sort of area where that could be a possibility in future…legally or otherwise!
The original outbuilding is essentially like a freestanding garage, brick construction on the outside with small cavity (empty or inconsistently filled we think) and a breeze-block inner wall, which has a layer of 15mm acoustic plasterboard attached to it. It has a pitched roof with rafters infilled with rockwool and 15mm acoustic plasterboard attached directly to the rafters.
We now have a completely freestanding studwork RWAR structure inside the building. It’s about 5mx4m floor area. This has been built on a floating floor and all studwork is infilled with 100mm rockwool and lined with 5mm of mass loaded vinyl. It's due to be finished with plasterboard in the next couple of days and I'm not sure whether to get the boards mounted straight onto the stud work of walls and ceiling, or use resilient channels. The current level of insulation when we've tested it is definitely headed in the right direction in terms of reducing sound transmission, and I'm not sure whether using resilient channel is enough of a necessity to warrant the extra expense and loss of space inside the room, but I need to make a quick decision. There seem to be a number of different opinions about the merits of using RC on an already decoupled structure and it's hard to discern who is just out to sell me stuff!
Then there are the different type of RCs…Some that mount onto a rubber clip system (such as Isomax), presumably most effective, but £££, and I’m not sure we’re far enough off the desired result in terms of sound reduction to justify the cost. More basic RCs that mount directly onto studs could be an option but I'm not clear if they are likely to make a significant difference to be worth the bother.
Would love to hear from anyone who has a pearl of wisdom! Very many thanks.