The B3 ist still an invaluable swiss army knife like tool for me. It's successor the B3n has a better sound (which doesn't matter so much under normal live conditions) but fails in everything else compared to the B3n. I wish ZOOM would have continued the B3 as a B3-X (pedal included) with better sound engine but keeping their features like DI OUT, Drums included, USB recording interface and finally battery operation, which is a life saving feature on stage for me.
Enough weeping.
The B1X FOUR has most of the features you're after (new sounds, rhythm section, battery operation, pedal)