Forget spending your money until you've got at least £500. Even then you'll be looking at second hand chairs..
Also, check out
http://www.dubstepforum.com/viewtopic.php?f=8&t=108331 which magically appeared typing 'chairs dubstepforum' into Google
I bought an RH-Logic 400 and cannot fault it. It is by far the most comfy office chair I've ever had for long periods in front of the computer.
Also worth checking out are the Herman Miller ranges, especially their newer chairs. I'm personally not a fan of webbing on the seat as it can become sore after several ours, so their initial flagship chair (the Aeron) goes out the window because of this.
Hag do an odd looking chair that is actually pretty comfortable.
Anyway, do some research before splashing the cash, and go and sit in some office chairs in your local ergonomics and office supplies stores. If you're really stuck, scratch around the second hand office furniture stores for a bargain.
Ikea have one or two okay chairs, but found their arm rests didn't come up high enough to actually support my elbows. After 10 hours straight, a lack of elbow support always left me feeling shit.
Check out the following ideas for some ideas on what's available:
http://www.backinaction.co.uk/
http://www.back2.co.uk/
For very very competitive quotes, get in touch with the people at
http://spaceff.com Their website may look wack, but their 'way cheaper than the competition' prices more than make up for the lack of eye candy.
Tips on bartering. Quote the best price you have seen online to a retailer then ask them to match it. When they beat it, go to another retailer and ask them to match the new price. When they beat that, go to third retailer and ask 'em to match it. Eventually, you'll be told they cannot go any lower than the prices they're offering. No problem, go back to your cheapest two suppliers and play them off against each other over free delivery, speedy lead times, inclusive VAT and any additional extras you can think.
London Road Office Furniture may look shady, but they have some bargains on the top of the line models that have been thrown away from the big london offices.
