Sounds like the $419 LW BCM upper is where I'm strongly leaning. Add a Magpul rear MBUS, BCM bcg, Gunfighter ch, MOE hg, and I'm at about $700 for the whole upper. Not bad.
The only other uppers I'm considering are Noveske ML (with BCG/CH/MOE) for a little over $800 and a Spike's ML (BCG/CH/MOE) for $510 from JoeBob's (out of stock). If I go the Noveske route I'll get it through ROG, a board vendor. That Spike's is awful tough to beat for the money, but who knows when it'll ever be in stock...or more specifically, if I'll happen to be at my computer for the 10mins that they have it in stock

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It'll be a 16" ML, with DE MOE furniture. I'm leaning toward a Vortex red dot. PSA has a deal where you can get a Sparc or Strikefire + Magpul MBUS for like $180.