My band uses one of two cheap but functional, "all-in-one", 8-channel PAs, with mains and monitors. One is a Peavey, the other is a Yamaha. Regardless of which one we use on our gigs, we seem to be plagued by feedback issues (not to mention ultra-picky singers who can't get enough of themselves even though the rest of us are going deaf from the PA/monitor levels). We don't use a seperate EQ unit. I'm thinking of looking for a feedback destroyer. Anyone have any particularly good experience with one? I know there are a variety available from Behringer, Peavey, Sabine, etc. I don't want to spend 500.00...our PAs were probably 900.00.