As a first cut, would I be better off getting a 28-105 zoom lense or a 50/1.8 fixed focus lense? They seem to be similar price, AFAICT from my slightly naïve understanding, one offers more flexibility, the other better quality. The camera+lense packages sold all seem to come with zoom lenses, but online advice seems to favour the 50/1.8 idea. I've no real idea of which I'd want to start with.
Basically, I want to improve on what I can do with my digital compact, the best of which are here.