Jimspov, off the cuff I think that amp will be much more versatile with the Zu's than Totem.
It will fit the bill nicely with the Zus but I strongly suspect will probably run out of steam early with Totem.
BTW I have heard both and believe either is capable of sounding top notch but only with the right setup as mentioned.
Price/cost alone means nothing and this case is no different.
Much better to choose wisely and save money whenever possible.
Cheers and good luck.