I am a junior in high school and have been playing bass for about two years now. Me and some friends are starting a band, and I need a new amp. I need something so I can play small gigs and practice with. I need it to be portable. I know quality amps cost a lot, but what can I get on a budget of $200-$300? What size range would that put me in? I don't know if I need dual speakers or anything like that. Should I go with an all in one or head and cabinet system? Thanks a lot!