Recommendation winter tyres in 235/40 R18 95V

Hello, I am looking for a winter tyre recommendation in 235/40 R18 95V for my Mercedes E-Class A207 convertible, as my desired rim would be available again. My favorite would be the Conti TS850P, but it has already been on the hump for a few years, with its predecessor 830P and also the old 810 in size are still available. Performance is important to me, price aspects are rather second-ranking (but should not sound arrogant now, I am already economical, but not at the wrong end). My KM performance is rather low in winter, which can change, however. Since I don’t necessarily need the WR this winter 2017/2018 but probably only later, I could still wait for the successor (is there already something known??) or just at short notice to avoid Conti850P or a better recommendation from you. What do the experts advise me here?