+1 for I run what I carry. Trophies are nice, and I've earned my share in shooting, martial arts, cycling, and other sports, but IDPA is a great arena to hone your skills with less than ideal equipment (CCW guns tend to be a compromise of size, wt, fit, and caliber). For fully built race guns, I shot IPSC. For IDPA, the only mod from "out of the box" is that I like my trijicon 3-dot sights (with the white ring around the dot)...and I do that to almost every semi-auto gun I purchase.
Just my $0.02