I'm not BigJim, but I'll chime in on the barrel length topic anyway...
A longer barrel will have some effect on gun handling. 2-4 extra inches of barrel only adds a few ounces, but since they are at the extreme end of the gun, they can make a difference on how fast or smooth the gun seems to swing.
Personally, I prefer a shorter barrel for upland hunting, because I feel that a faster handling gun suits me better for that kind of hunting than a long barreled gun (I'd choose a longer barrel for waterfowl where slower, more deliberate barrel movement is used).
But I only go about 160 lbs. A gun that feels heavy and sluggish to me may feel perfect to someone bigger.