Most all of them are fine.
I would avoid Olympic just because not all of their parts are interchangeable with other AR’s
Smokingfrog is our local AR expert
Davetex may have some insight, he’s built some AR’s
I'd like to get started with something decent for the money and then see where it takes me.
I love my old 1022, especially for all the things you can do and buy to make it whatever you want it to be and an AR seems to take that aspect to another level.