macbaseball and topgunn,
I cannot quarrel with you on aesthetics. I don't really care; I like them both; more importantly, I don't know if the original poster cares. But as a computer, for the video editing purposes the original poster stated in his other thread, the G5 iMac should outclass its G4 counterpart. Its specs are better in almost every category. If he can afford it, is simply a better computer that will be "good for most things" for longer, and better at other things. How it looks is another matter entirely, but the op never mentioned this as a concern. If he can't afford it, there are other G4-based options still in the current lineup.
As for a used G4 iMac vs. an eMac or a mini: if he finds the right deal, etc., a G4 imac is certainly in the running. But then his decision might come down to: nicer looks (subjective), possible savings, and possibly a better GPU vs. full warranty and some other benefits (more L2, faster SD), with roughly the same G4 performance.