As I have said in the past, I don't really go for high end sports watches. So I'm not the best to ask about these. But just a few years ago I was offered a Bathyscape for 7.5k at an AD. I declined because I really couldn't stomach spending that much on a diver, even if it was one of the few I didn't like. Piagets strike me as easy to get good deals based on my experience with Altiplanos, but I suspect Genta steels like the Polo probably are hard to get since everyone throwing money at Patek seems to not understand that putting your money back in your pocket is an option so they throw it at the next Genta steel.You raise a good point, at least one that I've wrestled with. I may have personally topped out in terms of sports watches at around that 10k range. Nothing Breguet excites me too much, but I think street prices on the FF and Polo S go around 10-12k, right? And I guess an argument could be made those watches may give me the step up I'm looking for without going all the way to 20k+ with the Overseas.
And the White Birch (or the identical watches with different dials sure to come) are probably 7-8k watches once the initial hype/demand drops off and they go for the usual GS discount.
So yea, good points, I actually agree with most of what you are saying.
Heck, if you want above GS level fit and finishing and don't mind a third party movement, go Minase (come on, who didn't think I would bring them up sooner or later). The Divido even has a slight Genta vibe. And it's cheaper. And has a great subtle and expressive dial.
Personally, if I were to go for a steel sports at the 10-20k range, I'd probably go Speedmaster 321. If I had to go Genta, probably Piaget. Piagets are quite well finished, if a bit large feeling (their current catalog at least). Maybe a Sky Dweller.