Maximum PC

So I am thinking of going with a water cooling setup when I upgrade next, probably to AM3+. I have a pair of 4870 1GB in CF, and am planning on keeping them through one more upgrade. The question is whether I want to shell out $200 to fit them with water blocks. I haven't tried overclocking them on air yet, mostly because I don't need the performance and don't want the heat/noise. So does anyone have any experience overclocking 4870s on air and water? If I can overclock them really well on water I would strongly consider investing in it, otherwise I will skip it. So any overclock numbers of your experience with 4870s on air and water would greatly help me determine the worth of water blocks at this point.

I wouldn't- 4870s overclock poorly regardless of temperature. Neither of my 4870s in CF will go past 790 no matter what I do. If you want it to be quieter and still be cooled well enough to ensure an overclock doesn't hit dangerous temps I would put something like a Scythe Musashi on them.

Thanks, oh well. Do you know what video cards do overclock really well, especially with water cooling?

current ones? 6850s and GTX 460s both overclock incredibly.