Does anyone run paired, "optimized" front/rear tires like
http://www.schwalbetires.com/node/1382 Stelvio Front & Rear HS 347 ?
(Continental has a similar concept with their "Attack/Force" 22mm/24mm pairs)
To quote Schwalbe, "Different rubber compounds specially developed and optimized for front and rear wheels. Maximum cornering grip and stopping power for the FRONT wheel. Energy loss minimized on the REAR wheel."
Bike Tires Direct has these for a very attractive price for a pair right now.