Why bother modeling if you could have the real thing?
If you need a bunch of different tones, use a bunch of different pedals. I have had more fun with a single channel Gibson Goldtone and an assortment of distortion, overdrive, chorus, delay, etc...pedals than any modeling gear I have owned.
I think you will prefer the "feel" of the Fender compared to the Vox valvetronix.