I've tried:
NO Xplode - Liked it but got immune
Jack3d - Liked it but for some reason it made me break out
Napalm - Better than NO Xplode IMO - Like it a LOT!
D-Stunner - Currently on it and really like it too!
You can also chow down a banana about 30 minutes before because they're full of Potassium!
Good luck on your search!