For an SLI setup of these http://www.newegg.com/Product/Product.aspx?Item=N82E16814130655 Any suggestions would be greatly appreciated. This is the motherboard I'm using, in case size may come into conflict... http://www.newegg.com/Product/Product.aspx?Item=N82E16813188069
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130665 http://www.dangerden.com/store/dd12v-d5_pump-variable-speed-by-laing.html http://www.dangerden.com/store/x-flow-black-ice-xtreme-iii.html http://www.dangerden.com/store/tygon-3603-tubing.html http://www.dangerden.com/store/danger-den-rad-reservoir.html http://www.dangerden.com/store/feser-one-uv-black-illusion-f1-coolant.html I recomend to go liquid cooled, otherwise leave the factory cooler on it and keep your waranty intact.
I don't think I'm quite willing to go to liquad cooling quite yet, maybe on my next computer. But are there not aftermarket fans that sit in your PCI-E area where you don't have a card? So you don't have to tamper with your VGA?
oh yes, they are called expansion slot coolers or slot exaust but i would guess they would interupt the proper air flow on the 580's because the 580 intakes air from the fan on the side of the card then exaust it out of the grill on the back of the card. those slot coolers would pull hot air from the rest of the computer down near the video cards so they will be intaking hotter air than ussual.
The only other thing I might suggest is adding a case fan if you have a spot on the side to blow on the card(s). Don't know if your case does, but if so, a case fan would be cheaper than the VGA coolers. A second thing might be tidying up your cables so any intake from the front of the case isn't blocked. Zip-ties are really cheap and can be had at auto supply stores or any place with an electrical section (Lowes, Home Depot, Menards) as well as places like Wal-Mart, Target, etc.