Pro Compare

My favorite setup with the Magic Mary is on the front: 2.4, Ultra Soft with Super Downhill casing and ony the rear: 2.4, Soft with Super Gravity casing.
This will give you awesome grip on the front and durability on the rear.

Check the prices in your region
Worldwide Buy at Chain Reaction Cycles
North America Buy at Competitive Cyclist USA
North America Buy at Jenson USA
United Kingdom Buy at Leisure Lakes Bikes UK