To be honest, I'd have thought the head would be saying sell the Sub. The funds could get something that would be much more interestingly paired with the SD.
Other than collecting for collecting's sake, I can never understand having such similar watches. I try to imagine when I could get up in the morning and think "you know, I really don't feel in the mood for wearing the SD today, but a Sub...yeah, that hit's the spot" and just can't.