I've mowed twice with it now and it really handles the hills great. There's one spot where I come around a side hill then turn up the slope that the front end actually gets a little "light". Diff Lock is amazing
I was reading another post about fluid in the tires too, and that may be in the future. I know it makes a HUGE difference in my old 504 Farmall.
On top of all that it really leaves a nice cut. I think Deere must run a little higher RPM on the blades than Craftsman, it seems that way anyway. Or maybe its just the deck design, but it does a lot better job of lifting the grass that gets run over by the front wheels and cutting it at the same height as the rest. My old mower if the grass got a little long you could always see right where the front wheels went because that didn't get cut evenly.
Anyway, I'm very happy and want to thank you all for the advice! I'll have to start shopping for a snow blower for it now