RE: 60lb pull good or go bigger?
I agree David. 60lbs is plenty of pull for hunting whitetails. The key is to get a weight that is comfortable for you. The last thing you want is to be over bowed and not be able to draw on an animal after sitting in the cold for a couple of hours or have to "draw on the sky" to get it back when an animal is infront of you.
If you're comfortable with 60lbs now I would get a bow rated 55-65 or 60-70 lbs. the more you shoot the toner your mussles will get and if you feel you need to bump it up you'll be able to. Bows tend to shoot better near the top of their weight rating IME.
Good luck!