I have a 6 (not a +) that should arrive in 2 weeks. As with the 5, my main case will be a Magpul Field Case. They also make a slim (executive) and bump (thicker, more protective) case.

Really great products. But the 6 models have not been released yet. Last week they gave me a 30 November ETA. And the release will include the +.
MAGPUL

Until then I ordered and received a Spiegen Slim Armor. Looks solid. The+ is priced about the same.
SPIEGEN SLIM ARMOR