Tomatoes with good shelf life & flavor

[Greatgardens]

I'm probably asking for the moon, but what suggestions do you have for tomatoes with both very good shelf life and at least decent flavor? "Long Keeper" has incredible shelf life, but has pretty poor flavor, I think. (I've kept unblemished fruit until March!) Candidates can be of any size, but I've generally found that larger toms go bad sooner than smaller ones.

Any thoughts?

-GG