If you have a small size wrist go for the 111, as the Bettarini case fits better on the wrist than the '1950' case of the 312. If you have big wrist any of the 23 will do.
As for the manual wound 111, it's actually fun, you'll enjoy winding it, and you'll probably do it more often than needed...
For a 1st pam rep I would think the 111 is more Iconic, and remember it's one of the best rep out, 99,9% close to the gen, easy to sell when you'll want to get rid of. The 312 is a nice rep but those fake bridge to copy the P9000 are not so well done, so it does not make it a super rep and on aftermarket they do not hold well their value.