Ok, folks, it's down to the wire. The two upgrades I am looking at are both Powerforce G4 duals: Dual 1gHz--$295 Dual 1.3gHz--$369 Basically, I am just weighing the two; the processor will replace a single 1.1 in my Sawtooth (see sig for specs). I'm just trying to figure out if the 300mHz bump is worth the extra $74; I stayed in the mid-range because, frankly, the high end processors are a waste in a 100mHz bus machine. So the question here is will there be much of an actual performance difference between the two in my Mac? Anyone have any light to shed on the subject? I'm making the purchase in about three weeks, so plenty of time to weigh in... Also, anyone have any positive or negative experience with PowerLogix upgrades? I've used a Sonnet (great) and OWC (just so-so), but never a PL. Thanks for the help!