My Cervelo came with a 12-25 that I use for everything. It does get tough when it's a 20% incline (!!) but that'll kill you no matter what your gearing is. On anything less than 15%, it's no problem for me. I forgot what the front was though.
I use all the gears on this setup, regularly all the time as well, so no wasted gears.
I use all the gears on this setup, regularly all the time as well, so no wasted gears.