A good gaming case that has good cooling, atx mobo, plenty of fans and the case doesnt need water cooling for under £90. Im quite picky about the looks so list a good few, the site would be good too.
Fractal Design R4, Bitfenix Ghost, Cooler Master HAF 922, many others.
Just so you know, there isn't a single case out there that requires water cooling.
If you're picky about looks, then give us links to a couple you like the looks of, so we can help you.