OK, I've said this about as often as I've disparaged gigbags, but as long as there are infidels I'll keep preaching; the only power amp I'd spent my money on (or yours if you'll listen to me) is Yamaha.
Yeah, it falls kind of short (or would that be long?) in the weight category, but (while I love a good tube combo for guitar) for PA or bass I don't want to hear the amp - and I want to be good & sure sure I will hear what it's louding, every time, all the time.
In my experience, put them all together and they spell "Yamaha"; purest sound of any amp (of many) I've worked with, and the only brand that's never crapped out on me mid-gig.
This has been a recorded message.
Peter