I have been looking around, but I can't find 6 in 1 tomatoes here in Toronto. Are they available in Alberta? I have been looking actively for alternative strained tomatoes, but none of the ones mentioned on US sites are readily available here, including at specialty Italian grocery stores.
I agree with the "too much dough/drain your tomatoes", consensus here.
Otherwise, looks like a darn tasty pie!
Maybe if you could go to your local grocery store and take a photo of the available brands of tomatoes, it might help us make a better suggestion for an alternate to 6-in-1 tomatoes.
I am not too sure what the ideal target for the sauce is. Is it preferable to chop up a can of whole tomatoes? Most of the varieties of crushed or stained tomatoes I use don't have much in the way of visible tomato chunks left in them.
Crushed or Ground (there is a slight difference between the two) or somewhere in-between, is pretty much the ideal texture, but everyone has a different preference for their sauce.
Some people like a lot of tomato chunks, adding additional diced tomatoes; others like a smoother sauce. From what I've seen of Pizzeria Uno (the original) and Lou Malnati's, deep dish sauce is more or less well-crushed tomatoes with a few random chunks in them. If you've ever seen a can of Lou Malnati's brand of canned tomatoes, they call it "random cut" tomatoes, and they are very close to if you had just crushed the tomatoes between your hands.
I might not be in the majority, but I actually prefer Muir Glen crushed tomatoes (with basil if you can find it) or the white label "San Marzano" tomatoes that are actually grown in California.