I have both the Vox and the Phil Jones Big Head. I much prefer the PJ BH over the Vox. It works with Alembics MUCH better than the Vox, cleaner sound, and lets the Alembic tonal character come through the headphones. The Vox has its own sound and a degree of background noise which colors everything. It was OK before I got the PJ BH, but I will never go back. I think you have made a great choice.
Jon