The experienced gear heads over at the Harmony Central Live Sound forum speak well of the XR box mixers from Peavey.
I have an older (and heavier) model, the XR696F, and have played a couple of shows with it. It's loud and clean. Great for putting vox and acoustic guitar through. For what I paid for it, I thought it was a no-brainer one-box solution to a lot of live sound situations.
If you also have a bigger gig-rig (I have an Allen & Heath Mixwizard 3) you can use the box mixer to run a separate monitor out to stage monitors with EQ using the line-in on 7-8. That makes your set-up pretty scalable to the situation. There are even workarounds to run two separate sets of monitor channels thru the XR8600.
For what you pay for them, and the utility you can get from them, I think these are a universally good purchase. You can try the Yamaha EMX series but I think generally the Peavey's have more grunt in the amps. Go for it.
