Dan, I'm kinda in the same boat as you. Keep digging, there seems to be a wealth of information on this forum, but you have to try to filter some of the posts. Sometimes good information appears in threads you don't expect.
The AR Discussions, the 'Build it Yourself' and the Equipment Exchange are especially helpful.
Just from my reading, it appears that there are a lot of brands making well made mil spec components. Bushy, RRA, Mega, Stag lowers all seem to be looked on with favor by many. I'm waiting on a bushy lower from Eagle for my first build right now.
For the uppers, it seems like Model 1 offers a good price/performance/quality break out, so I'm gonna get my upper from them. A lot will depend on exactly what you want to do with it: a plinker vs. a match rifle vs. a self/home defense weapon, AND how much disposable income you have.
Welcome aboard, it promises to be a great ride now that we can put any of the gadgets we want on them!!!
Don't be afraid to ask questions, the experienced guys seem to be willing to share their knowledge as long as you don't ask about something that got answered 2 threads before yours
he