i have the 13hp 1000psi for carpets only,not doing hard floors, dont know what advantage more psi would do me or larger engine size. i run 150ft of hose from it no problem. No room in van for any more hose anyway.
Having said that i would love the lioness!
Joe do you think you use the extra power of the 15hp and 2000 psi?
I think the 13hp is a great value machine and would be interested to see how much extra the larger capacity machines are and if pro rata there is much to gain.