My mains are powered QSC K12 speakers. In my acoustic duet we've been using Fishman Loudbox Mini quite successfully as a monitor. Now 4-piece rock band project is getting cranked up, and we're maybe month or two out from being tight and gig-worthy. So I'm starting to think about monitoring. Researching every possibility: - IEM probably out due to $$; and we run sound from the "stage" - the K12s work great in practice, so I've thought about maybe K10s for wedges - but for the same money as two used K10s I could get a good used QSC power amp and maybe 4 decent passive wedges. What passive wedges and power amp would be worth considering?