I'm in an acoustic duo and we need to buy a PA system, for guitar and vocals. Don't really wanna spend that much on it although I don't just want to go for the cheapest, so what's the cheapest good quality PA system out there?

Carvin for good quality! Mine is awesome with my Acoustic electric plugged straight into it.

Peavey has a cheep four channel that is not bad either crappy reverb thou.

PRS Santana SE
Ibanez MBM2 EMGs
Fender MIM Roadhouse Strat
Ibanez AS93 BLS

Carvin V3m
Blackheart 4x12 cab

Electro-Harmonix Metal Muff
Zakk Wylde Wah
JamMan looper delay

i have a phonic PA, it does the trick for smaller gigs and simple purposes.

i'd go for carvin if i had to do it again.
punk isn't dead, it's always smelled that way.

"A perfection of means, and confusion of aims, seems to be our main problem."