Heirloom tomatoes are great. It sounds like you have some nice varieties.
The black and purple varieties are very flavorful. Really they all have their own great unique flavor.
Red Brandywine are very nice. I have also grown Georgia Streak, Prudens Purple, Black Krim, Beefsteak, Mortgage Lifter, among others that I have forgotton. The larger tomatoes like Georgia Streak that are yellow with red stripes in them are really good.
The only problem that I have had with some heirloom types is that they are not as disease resistant as more modern hybrids and do not yeild as well.
Last year we grew Parks Whopper, Mortage Lifter, and another is Goliath.
Check out www.tomatofest.com
for a lot of interesting info.
Best wishes with your garden.