For water cooling room, I'd look at the CoolMaster Cosmos S.
It may be more than $200, but look on the CoolMaster website for a reburbished one in the CM Store (cheaper!): CM Store >> CM Products >> Refurbished >> Chassis
Sorry, but there are none in there right now.
THG used it in a System Builder Marathon in February 2009: System Builder Marathon: The $5,000 Extreme PC