Unless your really into the high performance there is no reason for a sport flyer to bother with the ceramics but they are very good bearings. I have used stainless on rebuilds when I lived in a harsher area to help combat rust but over time I have discovered all I really needed was the standard. If you go to any of the big bearings company web sites like Boca you can read what the engineers say about the different materials used and the whys. I get about 8 years or more of heavy use with the standard cheap old bearings so anymore I just order the standard sets.
I was just very impressed with the service I got from this company and how fast they got them to me and there prices. If only they had a phone number or returned there emails I would be more impressed but then I would have to pay more for the product, I guess on line ordering is OK whit this type of service.
Now, if I could only get those last three head bolts out of this engine things would be about perfect!!! It's always something to spoil a good day!!