corsair 520hx for system #1, corsair 520hx for system #2. Could get away with a antec earthwatt 430w on system #2 btw, http://www.newegg.com/Product/...x?Item=N82E16817371006
. Really no doubt about it.
For system #1 this PSU would do the trick as well, http://www.newegg.com/Product/...x?Item=N82E16817139003
. Some people are going to say you should go with the 520hx, or even with the 620hx. With the first I could agree, with the second I couldn't. It somewhat depends wether you will upgrade some components in the future though, but the 520hx provides plenty of headroom, even if you throw a 8800gtx in there, or a x2900xt.