Here is the culmination of 3 years of trying to find the right combination of weight, size, capacity, and ergonomics. And I am very happy with the results. I tried many configurations of barrel length, sights, stocks, lights, etc and this is my final and favorite configuration.
XS Big Dot tritium bead
Hogue 13" LOP stock and forend from Aimpro
Laserlyte tri rail mount
Insight M3X with Malkoff conversion
DD QD sling mount
IWC QD micro QD sling mount
Blue Force Gear VCAS
HSGI 5 round shotshell velcro sidesaddle
Brownells enhanced safety
Wolff extra power spring
My only dislike about if at all is that the light illuminates 1/3 of the front bead at an angle accross it when activated, but this is a minor gripe. A Streamlight TLR-1 does the same thing, but if I switch to a X300 later that might solve the issue.