Good question. I'd like to know as well.
I'd like to relate what I don't think you should buy.
I have a Norinco AK-47 variant. Chinese make. It's a pure "vanity gun" and I bought it because at the time 3 of my neighbors had them and I thought they were way cool.
Several years of shooting it and I can tell you the thing overheats like a SOB. I get worried the wood grips will combust.
Still, it's a fairly intimidating looking weapon, but you can do better with one of the above models.
It's a pure vanity gun. It's the same feeling firing I had revving up my "stock" Z-28 and then learning the guy with a 300ZX turbo that could fit in my trunk could drive circles around me.
Basically acquaint yourself with performance and read user testimonies before you buy.
Thanks for everyone who's posted!!! I'll be reading this carefully, as I am going to make a decision on a rifle soon as well.