I think the optics will mostly depend on what you plan on setting up the rifle for. You'll find all the fella's around here run damn near the entire spectrum of optics on all sorts of rifles. As an example, I use a Nightforce NXS on my 10B SASS, a Trijicon ACOG on one of my 10B carbines, an Elcan Spectre on my 10B SBR and straight irons on a 10B A2 carbine (my oldest). I use Troy flip-up backups on just about everything I have, just because I like some kind of redundancy. A bunch of Eotechs on a handful of AR-15 SBR's.
Like I said. Pretty much for what you want the rifle to be able to do. Long range, medium range, short range, kick in the door. You name it. More than likely, someone around here either has or had one.