Since you are an AR man, I seek advice.
I had an opportunity to purchase an AR-15 some three (?) years back, from an local gun club member, when the assault weapons scare started and the run on ugly guns was in full swing. I'm glad I didn't buy then, but I have since had this creeping desire for a "black rifle".
I recently went to Armalite's web site and perused their wares. Just window shopping. What caught my eye was the .243 and .308 versions !! Now I'm really interested !
What do you know about the different chamberings for the AR pattern? I know the accuracy potential is there, but do they hold up? Reliable in function?