mp3: ANY quality, but paula sounds is limited and rather cpu needy, u should get a mediator with vodoo3 and sb128.....atleast thats a good advice if u plan to use it alot for desktop usage.
if u have a 060 on the a1200, then u should be able to view divx, there is no prob for that but it will be slow!!!! , but mp3 it does fine on that cpu...infact better than ifu have a a1200ppc card with 040/ppc.
but i seriously recomend u to get os3.9bb2 and a gfx card if u plan on sticking around and using it seriously, as AGA is dated and well tbh even i think its not very good anymore in wb mode...but sure its fast and all, but not in 256 col..
rtg and ucan have 32 bit if u like....
if u have any more questions feel free to ask more, i have used amiga since 1985 and i still do..., i dont use pc's or macs etc...only AMIGA!!!.
also let us know how much money if any ...that u wanna use on it.... so that we can give some sort of advice what the best way to go is..
cheers