I like the way Specialized Dual Gel gloves fit. But for long rides padding isn't helpful to me. I still find myself grabbing the gloves with less padding for all but the shortest of my rides.
I minimize vibration by just not holding onto the bars tightly. And I try not to use any of the back half of my palm next to my wrist. When in the drops I just curl my fingers around the bar and my palm doesn't touch at all. For me that really helps eliminate the road vibrations and bumps from pounding into me.