S&W, DPMS, and Ruger all have very serviceable AR's in your price range, with no a whit's worth of difference between the three . . .
For some reason, I really, really, like this rifle. I would get the barrel threaded and leave the stock alone. I suspect this was originally an 6551. SOME (but not all) of the 6551s came with a plastic (cheap) buffer. Check yours and see. It is readily apparent because it is black (as well as plastic, lol). There were originally marketed as "Match Target" (MT 6551) rifles and were roll marked as such on the mag well. There is some debate as to whether or not the barrels are chrome lined. I purchased one brand new. It was crazy accurate. I ended up trading the upper, stock, receiver extension, and buffer assembly to a buddy for a complete Colt lower. I then used the MT 6551 lower to build my LE6945 clone and the traded for Colt lower to build my LE6943 clone. It should be easy to replace the plastic buffer with a steel one from Brownells.
I remember the thread where you were asking about these rifles and it sparked a great discussion amongst a few of my friends.
AWESOME rifle.
..... it's easy to be an AR snob...... but really no need to be.