Well, i got that exact head (the SVT-III Pro) and it is amazing. I picked mine up for $350, and i can not express to you how great of an amp this is. it has alot of versatility, the all tube preamp is very warm. Get that, NOW! BTW, how much is he/she asking for both of these heads?
Same III Pro that I have. Mid-90s. Still love mine after nearly a decade. It's got great tonal flexibility, comprehensive patch panel, plus it's light (26 lbs) for an Ampeg and it's also compact. Kim