I have HD25s and they're great for outdoor sound recording where the noise exclusion is a real benefit... but they really aren't the most comfortable things to wear for long periods. You also need to be really careful buying HD25s because there are several different models with very similar numbers but vastly different performance and facilities!
The model numbering is confusing but these versions below are all good, all have a split headband and a single-sided cable connection. (Watch out for the cheaper DJ version which is not what you'd want!)
HD 25-1 II - 70Ω - 1.5m steel cable with right-angled connector.
HD 25 II - 70Ω - 2m steel cable with straight connector.
HD 25-C II - 70Ω - 2/3m coiled copper cable with straight connector.
HD 25-13 II - 600Ω - 3m steel cable with straight connector.
Personally, though, I'd counsel against he HD25s and steer you instead towards something like the BeyerDynamic DT770 Pro. There are three models the 250, 80, or 32 -- the numbers referring to the impedance -- but the Pro 80 is probably the most versatile variant as it works nicely with pretty much everything.
Alternatively, the AKG K271 MkII is very nice.
These will both cost you around £110-£125, and they are both very high-quality, accurate, closed-back, very comfortable, and reliable. Both are very common in professional studios for tracking.
The AKG has the benefit of a detachable cord which can be useful (and is easy to replace if damaged). The Beyer has nice velour earpads...
And if you really want to spoil your man, you might just be able to stretch to throw in a very nice dedicated headphone amplifier as well -- something like the Rupert Neve Designs RNHP or the SPL Phonitor Mini. These are both around £475 each, so the total with headphones would push up to around £600 in total which I know is beyond your budget... but only by a little bit :-) -- and you could haggle for a food deal if you're buying both together.
Try KMR... Very nice people, always very helpful... tell them we sent you! :-Dhttps://www.kmraudio.com/products/recording-monitors/headphone-amplifiershttps://www.kmraudio.com/products/recording-monitors/professional-studio-headphones/headphones-type/closed