Remarkable taste for a 20yr old. Lovely watch. I think the Orion (no date) is the best dress watch for under £2k new. The cordovan straps they come on lend themselves well to being worn more casually too.
Which version are you getting him? My fiance bought me the 38mm Grey version as an engagement present. The watch is really well made, the mechanism is beautiful and seems to keep time well too.