Figured with some of the recent AR15 inquiry and "build" threads, I'd add mine.
I wanted a "dual purpose" AR15 - one with a short 16" carbine bbl for good handling and easy carrying yet still be capable of MOA or better accuracy with "good" ammo - and be reliable with a wide variety of ammo - a tough combo to find.
I started with this mid-length upper kit from Palmetto for $549: http://palmettostatearmory.com/2277.php . I see the price has now gone up $10 since I ordered mine. Still a great price, I think, for a complete kit (minus stripped lower) with MOE furniture upgrades and a match-grade 1:8 stainless Wilson barrel. What really sold me on this barrel was an ARFCOM write-up I stumbled upon about the 15K+ round torture test ADCO did on a similar Wilson SS match barrel (including full auto dumps). It survived admirably so I figured this barrel could easily handle what little abuse I'd give it. Five days after I presssed the "submit order" button it was at my door. The fit, finish and quality of the parts and assembly looked top notch. It even came with a properly staked FA bolt carrier.
I missed out on the $50 PSA lower sale, so I picked up a stripped lower locally that matched the upper finish like they were anodized together. A couple hours later & it was together. The lower fit the upper perfectly with no gaps or play, and the MOE stock fit the buffer tube like a glove with no play. Needless to say, I was extremely pleased with everything.
I tossed on a rear folding BUIS and a cheap red-dot for the time being. I'm waiting on a couple 1/2" risers to mount a 1.5 - 4.5x scope with QD rings as the primary optic, so I can quickly switch between it and the BUIS ... or put the red dot back on if I want.
Haven't yet had a chance to shoot it due to other projects needing my attention - like reassembling a jeep in my garage - hopefully soon, though!
JC