I originally upgraded to Rizoma pegs, which are excellent in that they are far cheaper than replacing the entire rear-set.
After getting into track riding and wanting to go to GP-shift, I went with Woodcraft and I am VERY pleased with them. Fairly priced (no Ducati tax), robust and each individual part is replaceable.
I also looked at the Litech stuff, which is also excellent and some people prefer them because they have a greater range of adjust-ability. For me, I could not get additional performance from them (adjust-ability of the Woodcraft was more than enough for me) compared to the Woodcraft so I went with the Woodcraft. (Much cheaper.)
Whatever you get, if you are riding the track I recommend the version with the fixed pegs (not the foldable). The fixed pegs provide additional crash protection in the event of a low-side.