PMI's Heavyweight Rescue Glove is the most burly rappel glove we tested. It is heavy and reinforced and should last forever. It is the beefier version of the PMI Lightweight Rappel gloves. The Lightweight glove uses goat skin for everything but the palm. The heavyweight glove uses cowhide for the entire glove.
If you are just looking for a great rappel glove, this is the one to get. It is durable and priced well. If you are doing a ton of sport belaying, I would also put this glove near the top. But if you want a glove for multi-pitch or big wall climbing, I would go with a glove with more dexterity like the Metolius Belay Glove.