Not knowing why you wish to purchase these, I would only buy those that are top of the line. It may be a good idea not to skimp on things that provide a safety aspect to your car. This is one area of the car that once it is in motion, creates constant friction and heat. Also, in my opinion, these types of rotors are good for high performance extreme speed/braking cars. For us Prius folk, we may fall a little short of that. With all that being said, if you dig the looks, at least get an expensive set that will keep you safe!!