I'd personally get the PAM127 first cause you can always get a PAM233. Prices on the 127 just seem to be going through the roof so I'd get a 127 first, if money is no issue. Whether or not I think the 127 is worth the price in the secondary market is another story though :P Otherwise, you can't go wrong with the 233 either.
Your 3rd Panerai (assuming the 232 and 249 are your 1st and 2nd PAMs) should be a Luminor IMO
Cheers,
Anthony