hey everyone i need some help choosing a new amp.... ive been playin for 3 years and havent been in a band yet so all ive been doing is just learning songs and practicing them. Im thinking of starting a greenday cover band soon though, so i need a new amp.... my current amp is a Cube 30X. What kind of wattage will i need to play a standard gig/ battle of the bands kinda thing? Also, im playing a fender showmaster which was second hand when i bought it 3 years ago... will i need to upgrade this or does sound only depend on the amp? help please!!