Thunderbird-54
Large and in charge.  The Thunderbird-54 offers gobs of power at an unbelieveable price.  You simply won't find this much controller for a better price, certainly not in the import bin!  This controller is super for great aerobats such as the Multiplex Acromaster or for smaller powered gliders.

Max amps: 54
Max volts: 15 volts 3S Lipo, 12 NiCad/NiMh
BEC: Linear regulator 3 amp max
Length: 2” (50.8mm)
Width: 1.15” (29.2mm)
Height: 0.4” (10.16mm)
Weight: 1.2 oz (34g)
Brake: On/Off
User Guide: Thunderbird-54 User Guide (492k PDF)