Nice choice - I look forward to seeing what you end up with! I was seriously considering a Boxster with similar requirements apart from wanting a manual. I was favouring an early 981 S, but also looked at a late 987 S. I just missed a very keenly priced 981 S that sold through an independent dealer at slightly over its asking price.
In case you didn't know, there's a classifieds section on the Porsche Club GB website: https://www.porscheclubgb.com/car-sales
In case you didn't know, there's a classifieds section on the Porsche Club GB website: https://www.porscheclubgb.com/car-sales