scotmak
The Nova or Super Nova is a very good choice for deer hunting with slugs.
The interior quality of the Benelli barrel is better and easier to clean up after shooting slugs than most other manufacturers barrels. This is no doubt, due to the industrial hard chrome and smooth finish inside the barrel.
The Nova and Super Nova are very accurate with slugs that the gun likes and I would expect that you should have no trouble taking deer out to ranges of 75 or 80 yards with ammunition that the gun likes. You will have to do some testing and shooting to see what you and the gun like so plan to spend some time at the range both getting used to the gun and to determine the range you are comfortable with regarding shot placement and accuracy.
I have a few of my Nova's set up with scopes, my turkey gun with a red dot and I also use the regular rifle site version but any should work well enough for deer hunting. My eyes are not so good any more so the scopes and red dot help some.
Pick the barrel length of your choice but, I prefer the shorter barrel lengths in general for moving through brush or in general, for other than bird hunting.
good luck
Paul