that's very nice of you sharing some thoughts about that.
About acoustic treatment I think I'm almost there. To reply James question about the recording room... it's the best treated room I have. It's not big nor live, but it was properly treated from scratch and has a very well controlled response. My mixing space is being taken care as well, though it's not all done yet.
Anyway, I woke up this morning thinking I really have some good gear at my disposal and I narrowed down a bit my possible choices and perhaps what I need is a better ADA conversion and/or a good plugin bundle. That would be my next best bet. Apart from that I am focusing a lot in researching and experiencing about microphones response and positioning, recording and mixing strategies and processing, a good talk with musicians about quality instruments and rehearsals, etc. As well said by Mixedup.
About the ADA conversion, which was my first upgrade thought and have motivated me to write this post, I have to say that I did some tests when I got the pair of Avalon 737 channels strips. I passed a completed mix through them and, although they're two separate units (not a stereo dedicated unit), I thought that could be a good experiment. I had the stereo mix coming out my fireface, going into the two avalons and out back to the fireface inputs. I was monitoring from that point (the return from avalon processing). The fact is that although I could get some good results from the equaliser the end result wasn't what I would expect. It was very subtle but I lost a bit of clarity (edge and precision?) in the mix. My conclusion was that was because I put two more stages of signal conversion (digital to analogue and back to digital) that degraded a bit the signal. That happened about 8 months ago. From that point on I always think that at some point I would benefit from getting something like the Prism Orpheus.
But you're right, maybe it's not the time for that. The Prism Orpheus is a very expensive gear and that has to worth and justify the investment.
Great!! Thanks all!!