I thought the market had bottomed out at $79.00 and ordered 2. They will be in Tuesday, I'll give you my opinion on them when they arrive. I'd have to see that someone had a successful build on the dirt cheap 55.00 forged ones.
Here's a link to a couple of succesful builds on the TNW's. They are cut from a 6061 billet, not 7075, I have done a bit of research on 6061 and with the beefed up design have no problems with using it. http://www.ar15.com/forums/topic.html?b=3&f=4&t=463760