I want to get new tires, Michelin PR3...size?

[Restlessrustler]

Im thinking of the stock front size, 120/70/17, but for the rear im tossed up between the stock 180/55/17, or the 190/55/17. Its for my xb9sx. I liked these tires alot on my old ninja, the stock tires on the bike are kinda hard, and im not really confident with them. Whats your opinions? I want to stay with a tire that lasts longer than 5k and like the dual compound...always put michelins on all my other bikes.....being this is my new one and def here to stay.....
Thanks

 

[g3stripes]

great tires but i didnt get 5k out of them! i currently run 190 but i like 180 a tad better not much difference tho.

 

[Restlessrustler]

why do you like the 180 a tad better? handles better? 190 too wide?