I've got a Mark V Accumark in .257 Wby and recoil isn't bad at all. With slow burning powders, you can fill the case with up to around 80 grains of smokeless, which is more than a .270 can hold. Buy my .270 kicks harder because it's a lighter gun (about 7.5 lbs w/ scope compared to nearly 9.5 lbs for the accumark w/ scope).
Don't let concern over recoil deter you. I can't think of any reasons not to get a .257 Wby. It's a great round.