Like others have said, it really depends on:
A) How many magnum rounds you plan to shoot in one session.
B) Whether you handload.
Factory magnum rounds tend to be hot enough to be be very rough to shoot in large quantities. Any additional weight will help. If you only plan to carry it as a woods gun and shoot very little, you'll be ok with the lighter gun.
If you reload, you can dial the magnum rounds back until they are not so brutal to shoot. Actually, with 44 magnum you can load powder puff rounds that have almost no recoil at all in a long barrel gun, or you can load fire breathing magnums that you will instantly regret. Reloading gives you enough flexibility that a lighter gun will be still a lot of fun at the range.
Personally, I reload and have the half lug barrel.