You didn't mention your budget, but here's a nice 430 on sale:http://www.newegg.com/Product/Product.aspx?Item=N82E16817139026
I think all PSU's with the 8-pin connectors can be broken into two 4-pin connectors. (Just snaps into two 4-pin connectors)
But I double checked with the manual for this one:
"The EPS12V power connector has a detachable 4-pin mechanism in order to
support either an 8-pin socket or a 4-pin “P4/12V” socket on the motherboard."