For your program (Coming from a relatively quick N5.8 and a exciting 14, and wanting a cat you can sail and right alone, as well as with the occasional crew) I'd suggest a Formula 16. Considering you are in the US a Blade would probably be the better choice if you are buying new. Frankly a wave or a getaway are way slower, and your grin won't be as large...

Otherwise there are 3 taipan 4.9 available in the classifieds, one of them from Rick himself. Those are great boats you can right by yourself, sail alone or with a crew by adding the jib.