Sorry I haven't responded to this post, I totally forgot about it. Silly me. Thats bad to hear about the Crown XTI series having reliability issue. Damn, and thats Crown too. Do you know if there is any difference in sound quality bewteen QSC and Crown amplifiers? I've had a QSC RMX-2450 and PLX-3002 ampls before and they seemed good sound quality. I was powering 2 Peavey Hi-Sys 4XT cabinets with the grey grilles. I've finally got some Celestion QXi-531 cabinets, 4 of them and am hoping to get another 4 if the guy saves me them, so I was hoping that seeing as they're Celestion and 3-way too th