My SpeedZone pack worked great, and I have seen great performance from TP too. Personally I am very greatful for the speedzone lipo pack being made by Gavin so I will support him whenever possible.
Team ORCA / ORCA USA / Pro Spec
Serpent America / Team Serpent S411 ERYX / On Point Racing OP12C, S120 / Xceed Products
Hangar 30 / Seattle RC Racers
Fasttrax Racing Series / NORA On Road Series