Hi there.
I currently am modding a Yeong Yang 5403. The internal layout is practically the same as that server case. In fact its cheaper and does look better IMHO.
Anyhow, as far as heat goes, using a 250GPH pump and a 100CFM fan, 400W of heat can well be displaced with the coolant at about 10C above ambient.
http://www.hwlabs.com/products
Good choice with the Yeongyang 5 series. The Black Ice will fit that rear exhaust perfectly.