It is definitely neat, but I honestly don't think it will be any more practical than your 8" revolver.
But if you're going to get one, go .44mag all the way. You can load the .44 down to 70% power (say, 180gr @1400fps) and still be easily as effective as a .357 pushing its limits. Just the same, you could run a 240gr bullet at 1100fps and have a very effective closer-range hog or deer gun that would still do well on 2-legged varmints. In a 4lb gun that shouldn't be bad at all.
But still, I don't feel like it would do anything better than a big, heavy revolver.