First off, I love my 5770 vapor and it runs ice cold. People will tell you to go 58xx series or get a fermi but for the games I run (TF2, L4D, SC2, Broderlands) the 5770 plus my 930 can max everything out.
In terms of cooling, yeah you are right to get rid of the stock cooler. The cheapest option out there of quality would be the CM Hyper 212+ which I got for 25 bucks. It does its job pretty well up to the high 3s I've heard. If you want to hit 4.0, you would want to look at the h50/h70 for premade "water cooling loops" or something like the venemous x/megahalems for air cooling.
The scout can be water-cooled but it requires some work. Usually the only rads you can fit are 120mm:
Unless you sacrifice the front 5.25" bays and HDD cage in which case a 2x120mm works (I think it was Striker36 or BriSleep that posted a picture of one held in using rubber tubing but I can't find it)
There are some watercooled scouts on the first page you can use for ideas. Personally, I am just going to switch over to a h50/h70 when I start OCing as it looks so pretty in this case and is easy to install.
I think that covers as much as I have learned from these guys over the past few months. Wait for the vets though, they will fill you in better.
Sorry for the wall-o-text.
I'll forget water cooling until I have enough money to make a new build for now I guess. Thanks so much, and will post back with my (hopefully) completed build soon!
I can't wait till this Thursday!
Edited by Shiro786 - 8/21/10 at 12:02pm