most of the rotors I see for Honda are in about in this price range:
Brake Disc Brembo IN STOCK $62.32 $37.91
N1000-28350 Brake Disc Winhere Manufacturing IN STOCK $26.25
N1000-28350 Brake Disc Mountain IN STOCK $38.86
N1000-129216 Brake Disc Bosch IN STOCK $48.51
N1002-134047 Brake Disc Set Sport Slotted Brembo IN STOCK $207.64
N1002-134046 Brake Disc Set Sport Drilled Brembo IN STOCK $161.93
N1000-28350 Brake Disc IN STOCK $58.68
This was taken from
http://www.bimmerzone.com (you can get parts for any car from there, NOT just BMW)
On my car I run these, and they're awesome: