ST 70 best sounding version?


Thanks for reading and for your input.  I am thinking of acquiring another tube amp to use in a secondary system and there are so many versions of the Dynaco ST70 available (will Vincent, latino, van alstine, etc).  Has anybody heard several and any feedback would be greatly appreciated....Ralph/Atma too!   Cheers!
pehare
I was searching for the link that rodman provided. I have not heard the new series 3, but it is selling for $1,500 when its price when it was introduced just a couple of years ago was $3,000, so it was obviously not too popular.

So bear in mind I have not heard it or any of the modded ones, but it is the one I would purchase. I do have the original ST70 with the desirable cloth lead transformers (I think that what they were referred to as), an original with the Japanese sourced transformers and a series 2 made by the Panor corporation. I just purchased another amp and will be putting these up for sale when I get around to it since I don’t need them all.
The latest issue of TAS has a review of a new version of the ST70. Looks pretty impressive! 
And I just let my TAS subscription expire, in November. I’d have enjoyed reading that review. 
For the same price, you can get a used Music Reference RM-10, a real nice 35w/ch honey of a tube amp. A much better amp than the ST70, which has some serious design deficiencies.