I went with the CT 26 because it was the smallest available in Canada. I am glad that i did I am only on my second bag full but that thing gets heavy going up and down the stairs as is can't imagine if i had a bigger one. Granted it is mostly drywall But but none the less I can't imagine it holding more and being heavier. I am also never seem to use it for two jobs in a row in the same place. A little job in the basement, up stairs, the garage then to a job site.