Well, me too,I was never able to get "in room tube amp sound" whatever i used for PA.
I have whole setup of QSC HRP's(122,153,181)x2 :!: through Midas Venice mixer...doesn't cut for me.
My advice,try any power amp(carvin dsc,cheap, great sound,I used it for a while until i got VHT 2:50:2,trust...