Those units are designed to be run into a full range PA. They sound better IMO into a keyboard or bass amp for that reason. I have a XT right now it's not like a real dedicated guitar pre amp that you put in a rack like a Marshall JMP-1 or a Carvin Tone Navigator. I would go with a PA SS power amp for a POD.
Atomic is what that amp is called. I am not sure on the wattage of them though????
So a Line 6 PODxt live, one of the big ass pedalboard looking things, will actually sound better plugged into a solid state amp??