Stretch is right on, of course. A new Speedmaster (get the one with the hesalite crystal) is also never a bad decision. They are 42mm, but wear like a 40 (they really do). Given that you like Seamasters, though, this seems like a no-brainer. Having said all of that, the Black Bay 58 is likely what I would get. It's a good size (a great size, really, and 12mm, which makes it versatile in an age where most Tudors are chunky), and I think it's just beautiful. The movement is excellent, as is the case finishing (Tudor cases are simpler than Rolex cases, but of a similar quality, which is to say about as good as it gets). I would buy it on the bracelet, but I would get the fabric strap with it (Tudor fabric straps are as good as Omega fabric straps).
In my own watch world, which was newly added to in a less thoughtful way, I'm actually really liking the Oris. it's simple, in a highly mid-century modern way (the design really reminds me of something JLC would make), the dial is beautiful when the sun catches it, and at 11mm with well sloped lugs, it slips under a dress cuff with absolutely no problem. The stock strap is too long (not something I ever thought I'd say!), but it's not too too long, and it seems to be lined with some sort of synthetic suede, so hopefully I won't get a rash and need to get a custom strap made. The overall quality is quite good. It's an SW200-1 Sellita, which isn't an amazing movement, but it has been keeping wonderful time, just like the ETA 2824 it's based on can. The funny 11 indexes between 10-12 isn't noticeable, except when you do, and it's kinda fun.