I have a colt 6920 and love it, out of the box I am hitting water jugs out to 200yd open sights. I am glad I bought it and know I can recoup most of my money if I want to sell it. With that said I also owned a rra and love that also. Like said before there are many good cheaper brands out there, look around and buy what appeals to you the most.
Rain, snow or sleet.... Mud, sand and dirt.... My GLOCK will work ;)