In general I go for heavier guns with bull barrels:

Reasons:
1) heat dissapation and harmonics (typically more accurate)
2) less recoil (to me this is very significant)
3) typically shorter barrels (more maneuvarable in a stand/box)
4) I think I am generally more accurate with heavier guns because I feel I am more stable (could just be a mental thing though)
5) I don't walk a lot!