I've never used Final Cut so I can't really make a proper judgment on that. But for me, unless you're making fully fledged anims I wouldn't think it'd be worth it (again, that's just my pretty uninformed opinion). Your G5 will run Logic no problem. With mine (dual 2GHz with 1.5GB RAM) I don't run into problems until I get about 8 audio tracks all using different effects (and I think that's mostly that the hard disk can't keep up). If you're mostly using MIDI you really shouldn't have any problems. The effects and instruments are definitely better in Logic (well, they'd wanna be huh ;) ) than in Garage Band, but personally, if I'm just mucking about I'd rather use GB. Just a quick question... is Garage Band really not cutting it for you? Not trying to put you off, but I also don't really want to suggest you spend money if you don't have to either. Have you got some examples of your work so we can see what you're doing and try to understand better where you're trying to go with it? Anyway, I really can't help you with Final Cut, but hopefully someone here knows something about it.