Rev C iMac G3 DV SE 500mhz - loved that machine, no probs, sold to a friend who still uses it.
Rev A 15in iMac G4 800 mhz - still going strong, not one problem
Rev C 20in iMac isight G5 2.1 ghz refurb (just got it) - love it! runs beautifully with stock ram.
I recently wrestled with the decision on G5 or Intel. I decided on G5 because I have several pro apps and didnt want to deal with rosetta. I need stuff to work now, not 3 months from now as well as shelling out more $$$ for the uni versions, I think I spent enough on the ppc versions. I know I'll have an intel iMac in a few years, and by that time, it should be everything we hoped it would be.
-ps some guy bought my iMac G5 isight for his kid 2 days before the keynote, they announced the intels, the guy brought it back to the Apple store screaming at the employees that they should've told him about the new ones!
He paid the $170.00 restocking fee & left with an intel. I walked into the Apple store & got it for $400.00 less, Wow!