QSC amps have a rep of being very reliable and sturdy. I have no complaints for my PLX 1602, in service for about 4 years, casual use, with an F1-x and an SF-2. It has been driving a single Eminence 3015 and an Epifani UL-112 in mono bridged mode (4 ohms). This rig is LOUD, clean, simply delicious.
I just swapped it out of my rack for a Peavey IPR-3000 (7lbs under $500 new) and my rack instantly lost 14 lbs. This weekend will be my first jam with the Peavey. I'm hanging on to my QSC just in case, but I look forward to loading my new lighter rack.
Some times though, I choose to leave that stuff at home, and drag out my old Traynor YBA-1A, when I'm feeling manly........