I've got a 6920 set up with a Trijicon as well, but this is what is up in the closet, ready.
My setup is based on my experiences, and my environment.
I like a slick carrier. Prone sucks with tons of crap under you.
Can isn't optional. I lost enough hearing shooting on a two way range.
D60 with Gold Dots. 2 30 rounders with stuff that will go through armor and barriers.
Comms set up with neighbors.
USPSA league with said neighbors.