And who wants to spend a round putting on Gloves of Man instead of laying the hurt down? You are a huge friggin' bear already, time to rip some faces off, time for the gloves to come off.
Depending on your Str score, and how much Power Attack you can get away with, a two-handed weapon will usually be better than two claw attacks. And you can use it more than once with high BAB.
Yes, I'm aware of that...
I just can't imagine telling my DM the following: "Kraagoth the Killer begins to bellow curses at the enemy, shakes his fists and begins to frothe at the mouth. Next you know, he's on all fours, only to stand up on his
hind legs again as a
huge raging battle-bear! Oh, and he also put on his gloves." Somehow, this doesn' feel right to me...