My GK Backline 600 head is only 8-9 lbs. It's cheap , sounds great and it's 300watts 4ohm/180 watts 8ohm. I've become a big fan of GK stuff since picking one up a few years ago. Their stuff is good bang for the buck and it won't break your back either.
I've never tried a Genz Benz bass amp but I've got a buddy who has a single 12" acoustic guitar amp and it is a first class piece of work.
I have purposely avoided trying Genz Benz and MarkBass strictly because I'm really afraid I will like them. I know the limitations of my will power
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When I bought my Seymour Duncan about 20 years ago, I walked past it a hundred times and laughed at the ridiculously high price tag . The salesman asked me every time I walked in the place if I wanted to check it out and I turned him down each time..........each time but once
That was the day I took it home.
Rick