I'll get all of that one day. Right now I want the S&W that I have had my eye on for a while. Then I'm getting a Marlin 60 which is a semi-automatic .22 rifle. Beautiful rifle, accurate as hell too.
I think you can get the .22 kit from Brownells as well. It should be $199.00. Get the one where all you change out is the bolt. The magazine it comes with is cheesy.
You want to get the Hi-Cap Black Dog magazines. Get two or three of those.
I actually prefer shooting the .22 ammo lately since the range officer does not get upset if i pop off a lot of rounds at a time. With the .223 he would get pissed off at me. Plus its a waste of money.
I dont know about the S&W Ar-15. If you get a good deal on it, go ahead. I have a Bushmaster and it has always been fine for me. I heard good things about Rock River, Colt, and a few others. Sig puts out a nice one as well.
The good thing about most AR's is that the Iron Sights are great to 100yrds. I can hit the black every time on the iron sights just on the iron sights.