There are some AR experts here. Most of what I know is probably dated.
If you want an all around good rifle I think any of those will be good. I have a Rock River and it is a great shooter. I'd make sure that the one you get can accept other Mfgs uppers, becuase it's nice to be able to mix and match, and I don't think they're all interchangeable.
My new one is a Rhino, and it really out shoots anything I've fired at range. It has a very heavy barrel, but only 1:9 twists. I'm still not getting why it has that rifling, but I can attest that it doesn't seem to matter, because I've completely confirmed their 1/2 minute of arc claims from the rest. It would be a poor choice for close work. Because of the barrel it swings slowly and wants to keep going, but it is amazingly accurate at distance even with the ACOG I have on it. I would put a more powerful scope on it, but it is an AR, and there are much better choices at distance. The muzzle break makes good hearing protection important.
Rhino Arms | Holy Second Amendment
I'm very pleased with it, but it's on the expensive side...