Hi there, I have a Vox VT20X which I'm not satisfied of mostly because of the crappy headphone output. At the same time I tried the Zoom G1Xon pedal and it both has awesome headphone output and effects. Since it would make little sense having a modeling amp AND a modeling pedal, I'd like to sell the VT20X and pair the Zoom G1Xon with a small, good valve amp. It should not be much larger than the VT20X: (W x D x H) 410 x 225 x 347 / 16.14" x 8.86" x 13.66" Any advice? Thanks a lot.