I would definitely go with a 1-4/6/8scope. There's so many options, many of which have illuminated drop compensator reticles. Nice to have the option for some or no magnification.
I've been running a bushnell ar optics 1-4 throwdown PCL on my 3 gun AR for a while, and I like it a lot. It has a built in throw lever, illuminated FFP reticle (acts almost like a red dot at 1 power), and has has hash marks out to 500 yards. If they made the exact same scope in a 1-6 model, I don't think I would have picked up the 1-6 strike eagle I got for my SLR build.