Mike:
Slug guns are not all that safe. If they hit a rock, the ricochets tend to travel a lot farther. I wouldn't necessarily scrap the slug idea, but don't use safety as a reason. At very close range, a slug will be devastating. However, you will be limited in range.
Really anything you've mentioned will work. The only one I'd really cross off is the 350 REM MAG. I shoot a 35 Whelen at times, and my neighbors know when I've had a successful outing.
My advice is to use the 308 WIN. It will bring the animal down. It is not THAT much louder than a 30-30, but it will do demonstrably more damage to the deer and with good shot placement, the deer will be anchored on the spot. It covers all the ranges, all the likely scenarios, and does so with aplomb.
If all you got is 9 acres and you've got houses all around, I'd just make sure that you are hunting from an elevated position and firing down. This is the best way to ensure the bullet goes into the dirt fairly close to the animal.
