Personally use a Bose L1 II system with Soundcraft mixers.. (I have an analogue one, my colleague has the new wireless digital version) JTV 59 + JTV 69 + 2 wireless vocal mics + electronic drum kit (real drummer) and occasionally a bass player too. It suits our style (ie NOT thrash metal! but we have been known to crank up the volume in rehearsal, so, who knows?) Also use this rig to mic a choir , a small mixed voice singing group and small stage plays so the use has justified the price paid in the last 5 years.
Tried playing through an Alto Trouper for a small cafe gig last year and my partner in guitar crime was not happy with the sound from his 69 (he was not using an effects pedal) and I was using a PodXT Live..
Try a Bose to see if that's what you were looking for.. and also perhaps some of the cheaper line array type systems that are now on the market...
..take a friend to listen, and maybe to play so you can listen..