This is my first Mac, and I could sure use some help form experienced iMac users. I will be buying a new (RevB) iMac G5 this afternoon with some aftermarket DDR RAM (two 1M sticks of DDR400). While I am familiar with Wintel requirements in CL ratings, the move from 600 to 667 FSB in the revB has me worried. The "rev A" iMac machine was quite happy with the CL (CAS-to-RAS) of 3 (the slowest and cheepest) memory. But with the faster 667 FSB of the rev B iMac, would through-put be helped by a CL of 2.5 or even 2.0? Newegg has Roswell 1M sticks on sale today for only $79 ($158 for a pair), but they are only CL 3.0. Your advise please .