You can find what you are looking for in this thread or send a message to brokenbar.

http://forums.gardenweb.com/forums/load/harvest/msg121400287050.html

As for the currant tomatoes, I make a point of not growing them because the production is very low and they tend to cross with normal tomatoes at a very high rate.

DarJones

There really is no "best" but there are literally hundreds of "great" ones. So you will want to define your criteria/needs a great deal more.

The thread linked for you above offers some great choices.

Currants - agree they are problematic and not worth the trouble IMO. Especially in your zone where thousands of varieties will do and be so much better.

Dave

Bio:

I have not dried tomatoes, but I did follow that link and Brokenbar suggested Opalka for drying. I cannot comment because again, I have not dried tomatoes, and frankly don't care to consume them. However, I do make tomato sauce (from all types of tomatoes) and my favorite tomato for sauce is Opalka. Given Brokenbar suggests it for drying and I can recommend it for sauce/cooking it might fit the bill for you. It has very few seeds and is not juicy. It makes a naturally thick sauce. They taste lovely cooked (or fresh - or in salsa) too. You mention heirloom in the subject... and I'm not sure if it's an heirloom, but it's OP... You don't know me, but I'm particular about my tomatoes and I LOVE opalka.

Hope this is helpful. Good luck in your quest.