Hi, just wondering if people think the V4B is worth the price tag. I'm looking for a lower wattage tube head to get a bit of distortion if I want it but would like the option to dial it out. There's a V3 for sale locally for $750 and it's cool but no master volume. Will I get a lot more headroom with the V4B? Also there's a bassman 135 for sale for $300. Will I be happier spending the money for the new V4B?