I use that same group, and they are just fine.
Old school, thumpy and deep with lots of capacity to flap your socks and punch the crowd.
With two B-410s, you'll be right about at 525 Watts. That load will be 4Ω, and if you wuz crazy like me, you could add another B-410 if you think you can keep the stack - er, stacked. That will give you the full potential of the amp at about 2.67Ω or so.
A single 410 will kick some serious power too. You've got the makings of an expandable and adjustable setup there with low dollars, a great warranty and usually instant replacement at GC if it fails in that warranty period.
I think you may have to buy it first at GC for that to work - but the manager at the GC I used to buy from said he'd take care of any Acoustic gear bought at his store or not.
Into three years of seriously pushing my Acoustic gear hot and hard - I've had no failures other than the connex on one of the speakers getting loose and I just pigtailed that one connection and have had no more troubles.
The B-600H head is a monster and it will light up any venue with tone (6 EQs), a switchable Notch Filter and Standby. There is an XLR out, a Wet/Dry EFX Loop, Tuner OUT, Ground Lift and I have experienced a three speed cooling fan. That's not documented, but that's the way it works.
When you want help to get a dual foot pedal to operate the Notch (On & Off) and Standby (that's great for tuning, silently) - let me know since I've done it and know how.