I guess my only concern is noise, I'm not exactly sure how loud 64 dBA is.... But I do know that the stock V8 fan only pushes out 69.69 CFM at 2000RPM.... So this definately looks like a good buy..... Should I go for it?
4.8? Stable? Good luck. You'll need a lot more than air to do that with. The V8 isn't exactly the best cooler as it is. A Core Contact Freezer would have been a better choice. Plus, it's pretty cheap right now, so if you've got the clearance in your case, I'd go for one of those, and if you've got a full tower and about twice as much money to spend, I'd go for a Tuniq Tower 120 Extreme.