Yamaha 1300 Tourer - Yamaha 1300 Tourer Fansite

After much reading on this site, I decided to go with the Dunlop E3 for rear replacement. I called my dealer to see if they had it in stock and he recommended against a radial and bias mix. ( I don't plan to replace the stock Bridgestone at this time). Plenty of miles left in it. He said it's not a safety issue but he has had a few complaints on the handleing from some that have mixxed the tires. Not sure if he is trying to sell two tires or stearing me away from something he doesn't have in stock. Can I hear your 2 cents worth from those that have mixxed bias and radial?

Thanks Dude62