i started with a generic case and a thermaltake bigwater se kit. im still running it now on my sig. I know, I know, I could do better but i gotthis before i was a member here. there are plenty of guys here that can recomend you parts and such. the first one i would suggest looking up would be ira-k. hes got some great logs and info on w/c.
You can to the right place for help. If you are looking for a good watercooling case, look into the thermaltake armor (I have pics of my setup "Tygon Tornado" in my sig). If that case looks too expensive,some members have done pretty nice setups in CM stacker 690's, especially Ericeod.