The only potential issue I know of is if you ever need to run OS 9. The original, that is, as opposed to Classic. Can't do it with a G5, or with most of the MDD G4s. The first run of FW400 MDDs are true "dual boot," in that they can run the old OS 9 so long as it was installed from the original factory discs. The FW800 MDDs can't. There was a later run of FW400s, but I don't know if they retained OS 9 capability. I use a Dual-876 FW400 MDD, and I like having OS 9 as a sort of emergency backup OS. It's tiny, and can be easily copied over to other archival drives or partitions so they can be run independently if need be. But that's only useful if you're computing on a frayed remnant of a shoestring budget like I am. Oh, and I've found this machine/setup to be unparalleled for doing once-in-a-blue-moon file recoveries on old/oddball drives. Having four bays and multiple file system capabilities casts a pretty wide net for doing recoveries. And Apple never got around to giving us back our four-bay machines until the Mac Pro. Okay, so there's another G5 drawback: they only give you two internal hard drive bays, rather than four -- and only one optical drive bay, whereas the MDDs have two. Those things matter especially when you're having to make do with old/used components. Otherwise, if you know you'll never need to run OS 9, and don't need all those drive bays, I don't know of any drawbacks in moving up to a G5. Sure wish I could. --DKM On Jul 1, 2009, at 1:53 PM, the Claytons wrote: > I've decided it's time to buy a new used Mac. My Quicksilver 733 G4 > is getting long in the tooth and I've gotten all these years from > the original hard drive, but I worry. > > Logic says that a G5 is the way to go, still I'm intrigued with the > idea of a "late model" G4 (perhaps a MDD 1.25) that I can max out > at perhaps half the price. > > I'm recently retired so I really don't need the latest and greatest > and fastest. But I do want to get many years service from it. > > Any ideas, arguments, suggestions? > > Ray > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4