Go with the 8GB then, it's really not a big deal. Also, cases typically come with a few fans, look into it with your case. See how many spaces there are for fans, and then if you would like, get whatever else there is open. But if you don't, it'll be fine. I've mentioned it plenty of times before on this board but I have a 3770k at 4.5ghz on a stock cooler with just the fans that came with the case and it has been rock-solid stable for an entire year.