Good block for the money--the white water is a Stew Forster design and only recently eclipsed by his G5 which Swiftech markets as the Storm Extreme Universal WB. http://www.cooltechnica.com/Merchant...tegory_Code=WB
The pump is junk--and as it is the make or break component I would look for a PC specific unit not some aqaurium refit POS.
The rad does not need to be some PC-specific part--the auto part's store, as has been posted above--is the best place to get your rad. I am using a 19.99 universal auto trans cooler and getting into Windows at 4.118 OC--I run stable at 4.09 with 52 C temps folding. That is with my one 120mm fan churning away at 970 RPM and barely pushing air at all (like 30 cfm) when I crank it up to 2700 RPM my temps drop immediately into the mid 40's.
The pump is a key compnent both for noise and system reliability and flow rates as well as pressure head. Getting a cheapo pump is a waste of time and money.
I reccomend the AquaXtreme pump which is marketted under various names but is available from Swiftech. It is quiet, PC specific, and rated for long term use. http://www.cooltechnica.com/Merchant...ategory_Code=P