The 333ES is so good, that its LP2 sounds good even without Type S. I got one when they were more reasonably priced, but it's now deceased and departed. The JE780 is well-spoken-of and while not exactly common, does turn up here and there for much less than the 333ES. I'm not sure the S500 was ever common, even in Japan. Don't know where you're looking, but besides eBay, you can always check out Buyee (http://buyee.jp/?lang=en).
Lots of folks record optically from their PCs! (I sometimes do so from an iMac...my PC has coax out...that works, too.)
I have a JA22ES, which seems to have a GUI that enables one to do titling and such from a PC, although I do not use that functionality.
Anyway, good luck, be nice to know what you wind up with.