There is also good information on M4carbine.net.
There's good information there, here, and so many places elsewhere that I've been reading until 2 am the last couple of nights.
Daniels Defense is maybe $300 more than I can spend.** That $300 will just about pay for an EOtech. The M&P15 is a good rifle and, with the $100 rebate, I could get an MP15X (811008) for $989, set up with Troy rear sight and what appears to be a good quality hand guard.
It's still not as good as a BCM, from what I can tell.
One of my distributors is having a special on EOTechs, and is also including for free their own (read: cheap) fixed EOTech-style magnifiers. It's not something I'd have on all the time, and it's not a flip to side, but it would probably be something for shooting at 100 yards at the range.
Does anyone know how long the special on BCM uppers is supposed to last? Are the uppers and lowers readily available, or do they make a batch, sell them, and then are out of stock for months?
Sorry for so many questions, but it's weird to buy something $1000+ without ever having seen it.
**Edited to add: they also put "Daniels Defense" in big white letters on so many places on their guns that I think they should pay the buyers $300 for billboard advertising.