I voted for the 4 inch model 29. IMO a 4 inch barrel is the most versatile barrel length you can have in a revolver, it's long enough that the velocity is adequate, balances quite well, and carries well. Finally, I think the 4 inch model 29 or 27 are damned good looking revolvers.

Can't vote for the 329, IMO it's just too light for the caliber and the muzzle blast with a Magnum will be deafening. However, that extreme loudness may act to drive a bear away even if you miss, just make sure you have some electronic hearing protection on or you'll spend the rest of your life using hearing aids.