Thanks for the feedback on the kit... I went ahead and ordered it already, so the reservoir is a-comin'

if it's more trouble than it's worth for me, I can always eliminate it. But I'd like to try working with one and see.
The MCW60 is just a larger version of the MCW55. 62mm square instead of 50mm. Other than that, it's basically the same design as the 55, and it comes with the 8 pack of ramsinks. Unlikely to do any worse then the 55, I'd reckon.
Lots of people over at XS seem to have scorn for the Apogee, it looks like Swiftech's marketing has much to do with that. It's really not an "extreme" sort of block, but some folks there feel that Swiftech has been pimping it as one. *shrugs* It seems to be pretty good from a price/performance standpoint, and I'm not looking to enter my machine into the Overclocking Olympics. I'm after a Quieter Cool and a fun new project; if I get more MHz out of my machine without a lot more stress as a result, that'll be gravy.
Anyway, sorry if this is turning into a hijack of the OP's thread. I thought it would make more sense to chime in here, than make another almost identical thread.
Edit: Yeah the OP's case may be a little short for a rear-hanging dual 120 radiator. Depends on how much the radiator blocks when it's attached, the Centurion is 18.9" high and I'm not sure where its rear 120mm hole falls within that span. I'm in a P160 which is about 20" high, and I've done measurements for the rad mounting... it'll do what I want it to. I've cut fan holes into cases before in the past, but I want to carve up this case as little as possible - I rather like it @ stock, and it may house a non-WC system for someone else some day.