OK, looking at building an upper and can't decide between an Armalite barrel and a Wilson barrel through Del-Ton. Anyone know anything about Wilson barrels? are they as good as or better than Armalite or should I go with Armalite? Any other suggestions?

Wilson makes barrels for quite a few companies including Rock River, Del-ton, and some others.  I am happy with my Rock River.  I'm helping someone build a Del-ton kit and so far all looks well made.  I believe Wilson and Armalite barrels are similar.  Both appear to be 4140 chrome moly and offer the option of chrome-lining.  Six one way, half-dozen the other, though Del-ton has treated me well and has great prices.

I am also interested in the accuracy of the Armalite ss barrels. Who makes them ? What chamber ?

i have a couple wilsons and like them.  a 24" .308 1/10"which i love, only thing i would change is make it a 26".  a 16" .223 1/9" which i wish was a 1/7" and wylde chambered.  both shoot under moa.  great barrels for the $.