turkeyeye, you didn't say where you are from or what distances you'll be facing with a sixgun, out here in the wide open west you most likley will need a little more smack, if you are an eastern hunter snuggled into a blind or tree stand then a 357 will work very well, I call them "verge" guns, they are on the verge of being too small but the key is penetration with a good bullet, if you get both you are going home happy. Perhaps limit your distance to around 50-60 yds maybe a little more & it will work, no problem, try & stretch it much beyond that & you'll probably go home kicking horse turds!
Factory 41 magnum ammo has about 12 ft lbs of recoil, the 44 magnum factory is about 16 ft lbs, thats 25% difference & can make or break your hunt. I really hate to seem them compared as they are both great, I've taken many, many animals with both, the 41 is quite a bit flatter if thats important & the 44 has the edge is horsepower (usually not needed) you'll have to decide which you want.
Shoot as many guns as you can before you buy because you will probably lose money when you have to trade a second time. I would definitely go with the Bisley & if I were going with just one magnum I'd probably opt for the 44 magnum, although the 41 magnum is an absolute hammer with WFN cast slugs. Don't over load it, that is don't get caught up in the velocity race, velocity is recoil, if my 41 magnum 250 gr WFN will penetrate both shoulders of a very large cow elk at less than 1100 fps, do I need any more?
Again, shoot a lot of guns & you'll make the right decision for you.
Dick