John, Here is the Michelin Optimum tire in 700cX25 at Amazom.com.
http://www.amazon.com/Michelin-Optim...473599&sr=1-71

the Michelin Pro3 Race Service Course has served me well and rides very nicely. (I have the 700CX23 on my R500) They have some links on the page for some buys on getting 2 tires a a package and I believe the Optimum are dedicated front/rear designed. Best of luck on finding the itre that suits you best.

Bill