I own 2 G3's with OS 9.2.2, fixing to throw OSX 10.3 on them. Other than the awful hard drives, which one died, but hard drives die, so meh, they've been as reliable and as stable as any other computer i've owned, as long as you have no problem with using powerpc based programs, or spending a lot, there's relatively no difference between the two's performace(with exception of flash for PPC). If one of you is just hoping for one of the companies to financially collapse, here's some thought to you: unless IBM starts making an OS2 sequel real fast, and one of our 2 os companies dies, there's going to be one hell of a monopoly, apple/microsoft/remaining company is going to charge insane prices for the software, because there's no competition (ubuntu is free people, no money sucking company behind it).
So competition is good, same goes for AMD & Intel, unless VIA grows a pair in the performance dept...