Since Bushmaster moved from Maine, (thanks Freedom Group), their quality has slipped some. They are still decent rifles, a tad pricey in my opinion. I think you can get just as good or better quality for the same or less money. With them, you are paying for the snake rollmark on the lower. Colt is good stuff, but again, a wee bit pricey for me. With Colt, you are paying for quality and the horsey rollmark on the lower.
Windham Weaponry is what the old Bushmaster was (same owner & employees, new name). They make top notch rifle at decent prices. There are tons of high quality manufacturers out there for AR15 rifles. Just gotta shop around.