only other one i would say as well would be the new patek flipback. or as he would be picking up 5 watches he may want to pickup the patek 24 w/ diamonds (of course) for the little lady.
if we're going solely on accuracy, i'd also say the 036 instead of the fiver as it is well known to be the most accurate out of the box. but then again if we're talking panerai (and he's willing to drop the coin) i'd also think of the brand spankin new 187.
i'll think of more i'm sure...