I'd like to build one, because I'd enjoy it. But I don't know if I can pass up the S&W M&P flat top, free float quadrail, dual flip up sights, for $1200, either....
I've been pricing it an have rarely come in under $8-900 for what I want to build. Base level RRA's go for $845-900 around here, and once I've customized it, I'm over the 1k mark anyhow.
Oh well, one of each I guess. One that works and one I built.