I will recommend the S&W M&P 15 Sport. $650 and comes with sites.
I appreciate the endorsement of the S&W.
I just bought a S&W M&P 15 Sport at our local CalRanch for $599 plus tax. No background check fee since I'm CCW, one Magpul magazine, iron Magpul flip-up sights... very nice weapon!
I'm about like Bulletproof, in age and proximity to the Grim Reaper. I want a 'just in case' gun (and for some fun with coyotes on the west desert).
I looked at lots of posts with about the same question as Bulletproof and the S&W came up as a common recommendation.
Good luck in the decision!