Hello, I am in a band that consists of bass, drums, and two guitars with the two guitar players and the drummer singing. We need a PA as we are beginning to play a lot of parties and some small bars. I have no idea what to invest in. I was thinking about the Behringer PMP2000 14-Channel Powered Mixer (800 Watts) with 2 B212XL 12" 800W Passive Titanium PA Speakers but not sure if this is the right move. Suggestions??