Good AR kits would be M&A, J&T; Model 1 may be a hair below, but I've gotten 2...one was perfect, the other had to go back, but the did take care of the problem in short order.
Building an AR from a kit is pretty easy...there are very detailed insturctions on how to put the lower together, and most kits have the upper complete in the box.
You really only need to buy an action block and an armorers wrench, you probably already have a brass hammer and set of punches. And, unless you plan on doing barrel installs, you don't really even need the armorer's wrench, although they come in handy for a variety of things.
YOu really can bulld an AR from the ground up in an hour or so, so that might be the way to start. You can get a complete kit and stripped lower for well under $600, including shipping and transfer fee for the lower. If you can get the lower locally, and avoid a transfer fee, that saves you money.
The Model 1 kits are as low as $400, depending on which one you get. Shipping is $17 to me, so I have put 2 rifles together for $517. Of course, one of them I immediately pimped out to the tune of another $350 lol.
Once you realize how easy it is to do this, you'll probably build a couple of rifles...it's easy to get the pieces one by one, and you can build exactly what you want, and plan accordingly.
The only tricky part to doing ARs is the muzzle brake...it makes installing float tubes difficult, since the brake will have to come off. Other than that, the whole process is pretty simple. My suggestion would be to start with an AR, then move on to the FAL.
There have been fairly exhaustive threads in the build it yourself section covering just about every aspect of builds, from what kit to get to what goodies to use.