Re: Power amp/powered mixer?
More info needed. Where will you use it, how many voices & instruments, what sort of band? What kind of speakers are you driving?
Separate the mixer from the power for a couple reasons. The biggest one is, the powered mixer is really only good for set-it-and-forget-it mixes from the stage. If you ever plan on using a soundman to actively mix a show, get a separate mixer that can go in the back of the room.
These days, I think a mixer and powered speakers is the hot setup. A lot of the powered speakers have small built-in mixers that would suffice for a solo singer/guitar or singer/keyboard act. Add a mixer for more players, add a sub for bigger rooms. It's very modular and scalable.