DIY. I just haven't ran across a total kit worth a damn. The Koolance is the closest they come to a good all-in-one rig...I guess leaving off the CPU block is a good thing, as I don't really care for any of theirs. They have one for $60 which sounds like it should be really good, but I'd still rather opt for a DD block any day of the week. Also, if your a chieftec owner, HighspeedPC.com has a little kickass kit to fit at the lower front of the case...so, I guess i'm now at 85% DIY, 15% Kit
SO...I just like that you can pick exactly what part you want in a DIY and not sacrafice at any point. Again, the Koolance unit is really nice...but some folks just don't want that contraption strapped on to a case or elsewhere humming away.