I think you should wait and see.
Or you just choose to buy an iPhone 7 if you like it.
Waiting for jailbreak...well, see how late iOS 9.3.3 (not iOS 9.3.5) jailbreak is released? I doubt iOS 10 would be the same, and improving iOS causes fewer people want to jailbreak. Plus, those security holes are becoming increasingly hard to find and a hell lot more expensive to find one.