I just wanted to know how well they can handle distortion pedals and wah pedals
Wah only if you use the Sanpera pedal. It some how makes every pedal on the planet ran through it sound pretty bad. My satchurater sounded ok at best. any other pedal sounded just bad, like horrid. but the vypyr has great tone (for modeling) by its self, just get a sanpera for your wah.
my vypyr sucks with pedals but does so much without them it justifies owning one.

Going to sell it soon though as have a ht-5 mini stack on the way