Wow. No responses?
I'll add my 2 cents here (and not take care of legal stuff like I should be).
Sig GSR 1911 RCS
Very pretty gun. Slim grips make it easy to conceal. I also like the checkering on the front and back straps, gives good controllability without cutting in to your hands. Shoots accurately, great trigger, I love the Novak Night sights.
HOWEVER: Out of the box, the gun would not shoot 100%. The gun would fail to feed about once every other magazine. After about 2,000 rounds, multiple magazines and a feedramp polish, I finally sent it back to Sig. The culprit was an improperly tuned external extractor. Runs much more reliably now, although Plan9 did cause it to Fail-to-Feed once.
LWRC M6A3
Love the furniture on it....I squirrel away all sorts of spare parts in to the MOE grip and VLTOR stock. Recoil impulse is noticeably harsher than a Direct Impingement Ar-15. Have not had the chance to test out the 'suppressed' setting on the adjustable gas block.
This gun really shines in the reliability department. Took it to a VTAC class and ran it 3 days without cleaning. No gun-related malfunctions. I know I can shoot this sucker, not clean it, and keep shooting without worrying much about malfunctions.
It is about a 1.5 MOA gun, although, it's a carbine so I'm not shooting for tight little groups.
Cons: Spits carbon deposit all over the front sight and under the front of the rail. Pain in the ass to scrub up. Carbine is also heavier than a stock M4/RAS (by approximately a pound--VLTOR stock, rails, and piston parts add to this.) More finish wear in the buffer tube. Noticed some rubbing marks in the buffer tube, contacted LWRC, was told that it was normal and I was seeing the teflon coating of the buffer tube, not 'real wear.' It's been 3,200 rounds since I've owned the rifle, so I'll keep my eye out for carrier tilt.
Overall I love my M6A3s, but have been itching to try out a Daniel Defense Midlength ($1100--a fricken steal!).
*ETA*: The M6A3s come with Nickel Boron (aka Fail Zero) coating on the BCG. IMHO, it is very much worth it. The finish is extremely slick, and I can pull out the BCG after a 500 round session and the Bolt Carrier will still be extremely slippery (although that may also be attributed to the piston system not evaporating all the lube off the bcg).