Your phone OS is no longer Available - what do you get next time round

OK - so the scenario is, it's time for you to upgrade. You can't use the OS you currently have - e.g. If you have iOS you can't get another iPhone, if you have an Android device, no Galaxy whatever for you, etc.

Under that circumstance - what's your "second preference" and why?

Personally I'm an Android user who'd probably consider Windows Phone 7 - it looks pretty cool and the tiles could work in a similiar way for me to the way I use widgets now.