Okay keep in mind that Colt is the one that follows the TDP most closely -- and for a high round count gun you will appreciate that.
Sparrow, who is one of the most active shooting civilians in Canada that I know has gone back to Colt -- why -- well when you shoot 10-20k of round a year thru your gun you will notice that Colt will give you the best value for your buck.
Ray will admit doing the BM (and other) thing for a bit -- but he has adamately switch back to Colt
Larry Vickers (noted Delta MSG and assisted in the design of the S&B Short Dot, Hk 416/7 and Hk45, as well as being a noted 1911 smith ) will say the same thing about notes he has from course with AR's and Colts
Pat Rogers (noted USMC Force Recon guru - turned NYPD ESU stud and now training guy for civilains and Tier1 guys alike) will mention Colt is all he can recommend.
I have pretty much all the guns under the sun - either in Canada, the US, or Iraq (and I still have some guns in Afghan if I ever go back there).
Colt is my first choice.
I will use LMT and KAC and some build guns by known guys (in the US - Denny, Wes/MSTN, and GrantT/G&R) with name brand parts.
In Canada with the 5rd mag limit and the fact that most shooters - save serious servce rifle shooters dont shoot that many rounds - the ABC rifles and LMT and Stag will in all likelyhood serve you very well...
But take it to the US for a course where you fire 1k of rounds a day...
well maybe the tolerances and the inspections of the TDP will serve you better.
-Kev