6920 vs. 6920 Magpul MOE

[evilblackrifle]

I'm new to ARs, and leaning towards Colt. I was checking out 6920 configs, and it seems like the price difference between stock 6920 and the Magpul version ranges from as little as $30 (G&R) to ~$70.

For that price difference, is there any reason not to go with the MOE version, unless you really dislike the MOE furniture?

Any ballpark estimates of how much it would cost to upgrade a stock 6920 with the Magpul parts, after factoring in what you'd get for selling off the stock parts?

Also, my understanding is that any new 6920s coming out of Colt are marked LE6920 and M4 Carbine - i.e., not more SP6920 or Sporter marks. Is that correct?