It definitely has to be Brett and Dawson. We didn't see much of them on ambo together but they are roommates and constantly go to each other for advice.
I think that they have a really good friendship and although it doesn't compare to the one Shay and Dawson had I do really enjoy seeing them together in a scene.
I hope that something happens on the show so that we can see more of them working together. That would really make my day!!