[Question] Got an SE with 9.3 on it. What to do?

So, I just so happen to find an iPhone with 9.3 on it. I already have an iPhone 7, and was wondering if it was worth selling my 7 and Apple Watch and use the SE as my daily driver? The reason I am iffy about it is because, I love the Watch and the 7. I wanted to get the new BeatsX with w1, and since ios9 is a bit dated, it won't connect through w1 (unless it's just a gimmick.) Should I sell the SE? I would love to return to having a main, jailbroken phone.

I am worried that ios9 will be too dated to do much on. Both the jailbreak and the os itself, since 11 is coming out next month.