Can't answer which would would be better for you. For me a target dot wouldn't be my choice for a hunting scope reticle but that may not be the same for you.
As to mounts the A0 VX II will reguire med rings, the 3x9x40 VXII you can use low.
FYI, Here is a link to Leupolds Mount Selector.
[link]http://www.leupold.com/resources/MountFitChart/default.asp[/link]
the leupolds have the clearest glass of any scope in thier class.
Very subjective.....I certainly have not found the same thing as you. Yes I own leupold scopes(Good scopes) but wouldn't say they are the clearest scope in any of their classes, nor the best(especially in todays market).