Ok, so I'm a spritely young 25 year old, who is now suffering his first real bad back issue! And I have established that my desk chair is shit and definately the cause (currently using a dining chair as my lower back cries every time I sit in my desk chair.) However.... I'm poor! As much as I'd love a £400-500 Herman Miller Aeron chair, I simply cannot afford to splash that much cash. So, I need you guys to help me! suggest a good quality, comfortable chair I can use for many many hours without my back dying! Must be less than £150 and ideally less than £100 I know it's a tall order, but there must be a bargin out there!