We, too, prefer September! We've been only once, this year past, but DW will have to work hard to talk me into a different time (unless it's the second trip of the year). But we also found late October to be decent. It got kind of cold at night (high fifties), and there was at least one day it didn't get higher than the upper sixties. The locals said this was unusual. The latter part of the trip it was around 80 during the day, mid-sixties at night. So if that's the type of weather you're looking for, you'll be pleased, as crowds are light. I have heard, though, that it's no longer value season?
Other than that, the later part of OCtober is good for the Halloween themes and the Food and Wine Festival in EPCOT. Make sure to visit Citywalk, which is gussied up pretty good for Halloween. Avoid the PGA tourny, early October.
Pat