When I made m&c a couple of weeks ago, the only remotely suitable shape at hand was shells / conchiglie, and my nephew declared that it was the only shape we should use going forward because it traps the sauce and cheese so much better. So, for your future consideration 
Also, this recipe is really good. I don’t use the cloves anymore, but the additional seasonings are really additive to the final outcome, and undetectable. I like aged cheddar in the mix, and also some parmesan to round it out. Uniformly kid and adult approved.
