You really don't want to see my study - it has so much stuff in it, all piled on top of each other.
Rhuwyn has great points; the important question isn't how much equipment you have, it's 'what is it stopping you doing?'. One of the answers to this can be 'being happy, because I don't like being surrounded by clutter'.
My house was (is-ish) terribly messy for various life reasons and concentrating too much on some things, and not enough on tidying. Do not let your living space get into that state, as it takes a vast amount of work to fix it, but also it is never too late.
I do like computers, retro hardware, and gaming, but to be perfectly honest I don't do that much of it. I spend more time going out, doing non computing activities, and general faffing on the Internet.
I'm downsizing *and* organising. I decided that my smallest bedroom (bookcases, lots of DVDs, clutter) should swap with my medium bedroom (current study, stuffed with computers) so that I can have a guest bedroom for friends, and a tidy project room. I like books, but if they're read infrequently is it worth keeping them, especially if they can be re-bought electronically and read on a Kindle. I've got rid of a bookcase, and a bookcase and a half worth of books is allocated to friends/charity shops.
Personally I do not mind being surrounded by equipment, and things will be *very* cosy in the small bedroom. It'll be tidy and organised, though, and that makes the difference to me. Your personality may be different - you may need space and minimalism. Work out what you want, and if your psyche needs the clear space, or if a nicely organised set of shelves/cupboards/other furniture is also sufficient.