I have tried a Liberator, Hype, and Karma, and I eventually still go back to my old Stingray/C. The ball uses the same core as the Cuda/C which everyone who bowled 20 years ago can remember how great of a core that was. The Stingray/C is an amazing piece that can still beat the balls from today.
If I had to choose one today, I would try to find another Liberator...never tried a Desperado though.
WOWZERS