Suggest a yellow for me.

[walt456]

I've always had a block against yellow tomatoes. To me they just don't have the flavor I associate with a good tomato. I like really acidic flavor in tomatoes. I've grown dozens of varieties of both heirloom and hybrid tomatoes but never include yellows. I know there has to be a yellow variety out there that I would like. What are the yellows you guys consider to be must haves in your garden?