All Dillon tumblers are great. I owned a CV-500 for about ten years before it gave out, had serious use! Loved it, was a great machine. When I bought a new tumbler last summer I went with the CV-2001 and haven't looked back. Now I can go to the range a few times without tumbling brass. When I do tumble, I can throw in 2000 .45ACP cases at a time. I love the capacity and the heavy duty motor on the CV-2001.
Check out the specs on the CV-750, I am not familiar with it, is its motor sealed and heavier duty than the 500? If so, I would think it would be a quality piece of equipment for anyone.
Dillon also stands by their stuff like nobody else in the business. Their CS is second to none. Buy with confidence!