Pro Taper Pillow tops. I find they don't get too slippery in the mud/rain. But, I probably go through about 2 sets per year (lots of riding.)
Pick up a grip donut as well, no more blisters at the base of the thumb.
Spray some brake cleaner on the inside of the grip just as you put them on, melts the rubber just enough that they end up sticking to the bars, and of course, wire them down.