If that's the Asetek LCLC pump, it's apparently rated at 60l/h (doesn't even hold a candle to a little DB-1, let alone a DDC). That's around 0.25gpm, which is WAY into the range of 'horrible' for a liquid cooled system, and that's probably the zero-restriction flowrate (which will never actually happen). And it's supposed to cool a pair of (overclocked) GPU cores and a CPU? And a single rad gets to try and dump all this heat? With a 60cfm rated fan? Likely using warmer case air?
If there are some specs out there suggesting otherwise, I'd love to see them, but I can't find any myself. And the numbers I can find are predicting nothing good with a stock system, and less once the overclocking starts. Personally, I'd just as soon try pissing on the cores, but maybe that's just me.
edit: yeah, I know what you mean about the 30" driving you nuts. Same boat here. My GTX280 works just fine, but now I'd staring at the upcoming games, wondering if it'll hold up long enough for the next big single-card to come out... never even had to think about it with the 32"lcd.