I just bought a V5 (great price), and now I'm starting to think about cooling. I should have considered this before I bought it, because now any cooling I buy will be double the price (2 chips to cool). Anyway, what do you all think about the stock hsf on these cards if I'm overclocking? Would it be worth it for me to give it watercooling when I build my watercooling system in about a month? I think I'm willing to give up only one PCI slot. Thanks.