Classic II will run 7.5 just fine. Hell even the old SE and Plus will run it if you have them upgraded to 4mb of ram. But truth be told, the Classic II is a bastardised low budget model version of the SE/30 with hardware limitations that compromise it's speed. If you want a better 7.5/7.6 experience, you'll need an SE/30. Otherwise, a Classic II probably runs best with 7.1.1 or lower.
