After a couple of bumper crops of suitable tomatoes, I got a food mill to try to help processing. I've never had similar crops since to put it to much use.

I want well ripened plum tomatoes (I usually try Roma VF but San Marzano would be an alternative) for this. I love the salad varieties (eg. Ailsa Craig) I also try but, for me, they don't have the right taste for a worthwhile sauce or soup.