Personally, the only baby diapers/pullups I can fit into are Pampers Baby Dry, Pampers Cruisers, Pampers Underjams, Huggies Goodnites, and Luvs. Other than the Goodnites and Underjams, I have to use extenders to make the others fit. My favorites are Pampers Baby Dry, Luvs, and Goodnites. Underjams tear to easily on the sides and Pampers Cruisers don't fit as well.
I've never tried any store brand baby diapers, so I can't help you if you wish to try any of them!