I do small club and outdoor shows with my pa, i use all QSC amps (with the exception of a crown and a backup peavy), because theyre decent and cheap. But your def better off getting a non-powered mixer, you have better flexability for upgrading.
My PA consists of:
1-
Yamaha MG 24/14fx
3-
QSC RMX 1450
1- Crown CE4000
1- Peavy
PV-900
4-
JBL JRX125 Dual 15" mains
2- B52 LX18V2 18" Folded Horn Subs
2- Celestion dual 15" Subs
3- alesis 3630 compressors
1- Alto Betaverb
1- DOD SR430QXLR Graphic EQ
1- 16 channel stage snake
1- 10 channel balanced TRS Snake
4- Furman RP-8L Power Conditioners
and alot of sm57 sm58's and audix om2's and TONS of cabling...
the point of that is, I started with a small board and the peavy amp, and it grew from there, if you ulimit yourself with a small powered board, your not going to have much room to grow before you replace your board. If you find you need more power, you have to replace your board, and spend more money, I just replaced the amps.
-C$