Rik Writer is right about the pricing, if you look around a little. What it boils down to is around $250, maybe a little more, to get the freedom to configure the rifle any way you want to, without worrying about the possibility of felony violations.
Even with low flash ammo, a 16" bare muzzle will generate heavy flash, and the muzzle brakes don't reduce flash, they just concentrate it (and the muzzle blast) off to the sides. A pre-ban rifle can legally mount a Vortex or Phantom flash suppressor, and the results are amazing in low/no-light conditions.
I don't like collapsible stocks, but a pre-ban can legally mount one of these if that's an issue for you.
Realistically, I can't get really excited about bayonet lugs, but I do think the rifle looks silly without it and it's not legal on a post-ban.
Since you're going to spend a fair bit on any AR-15 rifle, think hard about whether it isn't worth saving a little longer and getting the flexibility of a pre-ban. Unless you're really committed to doing only target shooting -- in which case you're better off with a bare muzzle -- you might decide it's better to wait a little longer. Something to think about, anyway.