After only 3500 miles or light riding, I have to once again replace my rear tire. I was set to buy a Kumho RF, but I discovered that the Kumho ECSTA XRP is a summer tire. I ride year round. So... Without a flame war, which CT is the best year-round run-flat to put on the rear of my wing? I will respect all opinions and will appreciate an explanation why you think your offering is the best.