This Friday I'll be picking up my new Bushmaster lower receiver. It will be the second product of their's that I have owned. The first was an early version-most likely preban since it was bought new buy a friend of mine approx.15 yrs ago and came NEW with collapsible stock, bayo lug, and flash suppressor!(d'oh! never shoulda sold it!)Anyhow, I plan on building this new one into a medium range(0-300 yrds)varmint gun and would like some bottom line advice on who I should buy the upper from. I've been looking at DPMS, but their uppers are around 2.5 times more than I paid for the receiver. Should I go with Model 1 Sales, or is there a better alternative? Any unbiased opinions would be very muchly appreciated