I use the Power Stage 700 with my Helix into a 4x10 for all my bass gigs, and a 4x12 for all my guitar gigs. Plenty of power and amplifies with clarity all the way to full volume.
The in built EQ is so handy for on the fly adjustment during the gig, no menu diving etc, and each input has an associated di out with optional cab sim, very handy.
I love this machine. I would absolutely buy this again with no hesitation.
I am even thinking of buying the 170 or 200 as a back up.
If you want to power a cab on stage you can't go wrong with the 700.