I have the bushnell dusk to dawn 3-9x50mm and don't like it. It's heavy, long, narrow field of view, and not as bright as it should be, probably because of it's length (same tube as the 6-18x50mm). I pulled it and put on a 3-9x40 bushnell banner (should be a bit cheaper) and it has alot more field of view, mounts much better, and is alot lighter.
I've owned multiple 3-9x50mm scopes, long and short, all heavier than the 40mm brothers, and none of them are currently mounted on anything, they're just backup scopes. All of my 3-9x scopes that are mounted are 40mm. Of them I have to say the 3-9x40mm bushnell elite 3200 is the best. It's brighter than any 50mm scope I've owned, it's has incredible clarity. My bushnell banner 3-9x40mm is very usible, and is all you need for hunting, but the nicer higher quality optic scopes really spoil you!
later,
scruffy