Not that the 5980 is not a good watch, it is, but getting a 5711 and a Reverso Grande Date is a very cool option.
It was the 2d Grande Date of the modern era, the first being the Septantieme.
As for new releases, take your time, enjoy what you have, then you'll see. The Polaris is another icon, as well as ... The Duometre à Chronograph?
But that is another story.
Congratulations!
Best,
Nicolas.