I don't have a 308 AR-10 but I do have a 243 win one. I like it well enough. I have a CETME I built I need to fix and re-test though. The nice thing about either is the mags for a lot of the other 308 platforms are kinda spendy if you want a few of em.
I was really tempted to do the 22-250. How's that work if you don't mind me asking?