I have been looking at two pro reverbs at some shops near me, and I'm ready to make a purchase, but i'm torn between the two. one is a pristine early silverface, probably a 70-72 (i haven't pulled the date codes off yet) and the other is a HEAVILY, I mean HEAVILY modified 60's blackface. the blackface has peavey sheffield speakers, a line out, a push-pull gain boost on the trem channel, and a couple of other strange mods i couldn't figure out without taking the chassis apart at the guitar shop. the blackface is a little cheaper, but will cost, i'm guessing, 300-500 dollars to get it back to original specs. another caveat on the blackface is that when adding the line out, they drilled through the serial # stamp on the chassis. they're not collector's amps, but rather players, what would you guys go for? blackface the silverface and call it a day? i think the silverface has the utah speakers in it, too.