Tedwhite:
The M6 classic is a terrific user M unless you need AE (in which case, M7) or digital (M8 or ... ?). Earlier cameras are great (and may "feel" better) but lack the meter (exception: M5). There are more expensive cameras (MP) but functionally they do little or nothing that the M6 won't do for you. They may make your picture taking a happier experience in other ways, if you're willing to spend extra.