NickO
1726
I'd go in a slightly different direction....
I know from personal experience it is hard to always know what someone else would like the most when it comes to expensive gifts - I've missed the mark a couple times.
$10K to $14K is a nice sum of money. I would get your son's input into what he would like. You should just tell him that he is turning 30 and you are so proud of him that you'd like to buy him a nice timepiece to commemorate the occasion. Give him a sense of the price range and then arrange for the two of you to go shopping together. Pick the piece out together, it will be a very memorable experience for you both!
All the best,
NickO