Rossbernstein, the three main sources for Dynaco kits are Triode Electronics, Bob Latino, and Dynakit Parts. All of them are a different implementation, and as such, will sound unique.
I also own a Dynaco ST80, but not the more ubiquitous solid state product with that moniker. It's the rare tube version from the early 1990s that was a redo of the ST70, addressing the myriad criticisms of the original. It features a regulated solid state power supply with much more capacity, driver section using 12AT7 and 6922 tubes in Mullard long tail pair configuration (like the VTA/Latino, KTA, etc. upgrades), individual biasing of the four output tubes with two color (green = low, red = high, out = OK) LEDs, and triode/ultralinear switch.
But, I think it's good to begin (and, possibly end?) one's journey with the original, so I recommended the version from Dynakit Parts, as it is the true Dynaco ST70, updated with modern parts and a bit larger power supply capacitor can. While it does not possess the power of larger tube amplifiers with more output tubes, and there is a looseness in the low frequencies (there are a few simple/easy tweaks for this), I find a certain beguiling purity of sound, along with an astounding degree of resolution, detail, and overall refinement. One thing about the ST70, presuming you don't partner it with a speaker that pushes it out of its comfort zone, it's just an incredibly pleasant and easy to listen to amplifier, and you can stay up with it long into the night. It seems equally happy with rock, jazz, or classical music, and does proper justice to all three. I own amplifiers that cost a whole lot more ($5K - $15K) than my ST70, but I'm more happy listening to it than most of them; I think that's the biggest compliment I can pay it.
The point I made about new products using the classic designs directly applies to most of the Chinese tube amplifiers. For several years, I was the importer for one of the largest Chinese high-end audio companies, so I have some background and opinion there. They normally employ the Mullard long tail pair driver stage with an ultralinear (sometimes, with switch for triode operation as well) connection output section. They usually sound nice enough, but apart from one or two companies, for several reasons, the vast majority of these amplifiers have exceptionally poor resale value.
Also, I wouldn't be in a rush to move away from your Totems, and I certainly wouldn't sell them before coming into the tube amplifier. You might find the combination makes you happy. That doesn't mean I think they're the friendliest match, but I'd at least give it a chance.
Mezzanine, while I've not spent a lot of time with the Granite integrated, I owned the monoblocks as well as the tube output CD player. They were incredibly nice components, always made me happy, and Don Hoglund was a terrific guy to deal with.
