Quicksilver fan here (I own one!!!!!!). Yes, the most beautiful of the lot!
I really thought the G3s were cool. When I worked as an Ad Compositor for the Desert Sun one of the new hires got a brand spanking new G3 as his workstation. Then they started replacing the old Macs with those making some of the old timers there very happy.
Always though it was cool and was very disappointed to see the gray "blah" of the G4s. It didn't start looking good until the Quicksilvers.
STILL DON'T SEE where there's BLUE in the G4s! Sorry, just don't see it. All I see is gray - everywhere!
Yeah, the 'graphite' G4 doesn't look so good. The MDD is pretty cool, but it has too much bling. The Quicksilver is cool too, but I find it a little plain on the front. It looks more solid than the MDD though... Having been a car fanatic, I like to think of the MDD as a Cadillac Escalade and the Quicksilver as a GMC Denali or something like that. (if that connection can be made) I prefer the frosted plastic of the G3, but the G4 QS/MDDs' acrylic finish is nice. My QS is a lame (single CPU) 867Mhz model, but it is in nice, shiny condition with the stickers still over the drive slots and all the original packaging. I just put the guy out on display and hid the box away... maybe I ought to do a quick photo shoot of it. The Pro mouse that came with it has a messed up wire, but the acyclic finish on it is the shiniest and cleanest of any darn black Pro mouse I have personally seen.