I love the strap choice.
But all I ever find in my sock drawer is ... socks.
I'm not sure what the question is, exactly? But either way, the Senator Sixties (is that right?) is a beautiful watch. Great picture.
In Communist East Germany, the traditional watchmakers of Glashuette were amalgamated into a single production facility called GUB. After the Wall came down, some of the old family businesses split away and revived: A Lange & Soehne the most prominent, also Muehle, Tutima and Union all came out of the GUB umbrella as independent companies. ALS was later bought by the Richemont group (owners of several other watchmakers, including Jaeger LeCoultre, Panerai, Cartier, and Vacheron Constantin, among other things).
The remainder of the GUB facility was re-branded Glashuette Original, and initially continued producing some of the GUB-developed pieces, for a short time. It was later acquired by the Swatch Group, who like Richemont, own seven or either other watch makers, from Breguet and Blanpain higher up, via Omega, Rado and Longines, down to Swatch at the bargain basement. GO seem to sit roughly next to Blancpain in their brand positioning - above Omega, and a shade below Breguet and Jacquet Droz.
Since then, GO has continued to develop a very distinct design aesthetic, borrowing from the GUB back catalogue for things like the Senator Sixties and Seventies ranges, with modern interpretations, high quality in-house movements, and often using the large date window that has become something of a Glashuette hallmark. For some, they are too close in style to Lange, and even accused or plagiarising the Lange 1 for the Pano range. But I don't think there's any dispute that if you like their styles, the quality is excellent. Unlike Lange, they made most of their watches in steel, and with the resultant combination of relative accessibility in price with unique hand engraved balance cocks and other detailed finishing, they give a pretty good bang for the buck.
If there's a down side, it's that the brand doesn't have anywhere near the recognition of some others in its price range, which means a big hit on resale if you're the kind who wants to buy new and changes his mind a lot. But that doesn't seem to be the case, and I'm sure seven years ago they were a lot cheaper than they are today. So I think you're on a win either way. Also, even though it's a smaller brand in some ways, the Swatch ownership means that you should be on solid ground for long term servicing and support. On which point, although I'm surprised that a crown would actually break after seven years (you must wind it pretty hard!), it's the kind of thing that might often be replaced at that interval during a normal service, so no biggie. I'm told about five years is a normal service interval for a quality watch. That would seem to be the case here.
I have to say that if you felt like changing the Sub, it seems the least likely of replacements - another steel diver? But then, I do recall you have a lot of steel sports watches on bracelets. And variety is the spice of life, even if the differences are subtle. Looking good.