Been shopping for it this weekend.
I've been looking at a DPMS Upper AR-15 Flattop .223 Remington 1 in 9" Twist 24" Bull Stainless Steel $413.99 (from Midway).
I'd like it to have a fluted barrel, and a 5.56 chambering but going this route saves me nearly $150.
From their all I should need are some good optics, and a bi-pod. Perhaps upgrade my stock on my Stag m4gery lower, since I plan on using that for the long range upper as well.
I figure I can have the best of both worlds this way; a CQB carbine, and a long range rig I can switch to by changing my uppers out.