My son just got an old Ampeg V2 guitar head and it got me thinking about whether I should consider upgrading from my current PF-500 + VT Bass to the new V-4B. I am happy with my current rig but man, that V-4B is cool. Anyone have thoughts on whether this is worthwhile to consider? One question I have is whether I would get sufficient clean headroom out of the V-4B as compared to the PF-500. Thanks.