I like what 308LAW said above.
However, I would refine it a little more...
Look at
the best Leupold VariX in 2-7x variable.
Take a look at the clarity and compare the brightness to the high-end scopes listed by 308LAW
before you buy.
Keep it on 2x all the time for acquiring the target quickly.
If you have need of the long, well-placed shot, then crank up the power and
if you can easily "hold" on an imagined 4" bullseye on the deer...
have at it...
If not, "hold your water". 
If you need more than 7 power... stalk closer.
If you want to be the coolest "dude" on the hunt...
it won't matter what you use to wound the animal.
That being the case... get a really
high-end 4-12x scope.
