I've been very happy with my VHT Pittbulls. You have to make sure they are a Steve Fryette version. Fryette sold VHT to a Chinese company a few years ago and now makes his amps under his name, Fryette. I have no experience with the newer Chinese VHT's, but the rumor is they are not as good. But they are very versatile amps with great tonal qualities at low or surprisingly loud volumes.
Here is a review of the VHT Pittbull 45 (Fryette VHT):
https://www.ultimate-guitar.com/reviews/guitar_amplifiers/vht/pitbull_45?no_takeover
If you know about Fuchs amps and what the Dumble amps were, I have one of Fuch's original dozen prototypes he used to arrange his angel funding to get started. It's the closest thing, I believe, that you can get to a true Dumble, but with a lot more tonal range. It has a tonal discord that is is unnerving. The only time I felt like the way I feel when I play through it was the first time I saw Van Halen in the late 70's. The tonal discordance literally gave me a body shake for days. The subsequent Fuch's brand amps were much more refined, but this thing is a monster. I'd consider selling it for $5,000.
It is the prototype for his Overdrive Supreme (Dumble were called Overdrive Specials). Here is the current website:
http://www.fuchsaudiotechnology.com/amps/overdrive-supreme