Michelin Commander II has a good long wear reputation.
What sizes of those will fit the NC?
120/90-17 is OK for the front? ($172.72)
160/70B-17 is OK for the rear? ($190.64)
Stupidly expensive, though. May be out of the running just for that.
Together, that's a $500 set of tires!
$260 for the Conti Motion (tires + mount) = 10,000 miles
$500 for Commander 2 (tires + mount) = ????
the commaders would have to be in the 20,000 mileage range to be worth it.