My friends and I will be starting a small band. I will most likely be playing piano in it. Im going to be getting a PA for use with vocals, guitar, and piano in the band, along with using it for an upcoming wedding. I want to know how it would sound if I bought a power amp, small (probably beringer <sp> ) mixer, and a pair of speakers - compared to - a powered mixer, and then the speakers and a mic. Would it sound any worse/better if I got the power amp and mixer seperate? Im proabably going to be spending around $400. If you can tell me of any good setups for that price that would be a big help. thanks.