odie,
I think the .41 mag. is plenty of gun for deer as well. I started hunting handgun for deer with my SBH .44 and still like the power to weight ratio. I love the SRH platform, but if I was to buy one, I think I would go with the 454 Casul just for the flexability, and scope it too. If I'm going to carry a gun this size, another 8-10 oz. would not make that much difference to me. I like the portability of the single action and .44 is more than enough.
Good luck this year, and if you get down to the Burr Oak area, let me know, there is some realy good hunting in that part of the state.