Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA
Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur
Just throwing it out there, but Ultegra offers a 12-25, which is my favorite all-around cassette. If 25 is a low enough low gear for you, it's a good bet.
12/25 Tooth (12, 13, 14, 15, 16, 17, 19, 21, 23, 25)
Those one-cog gaps in the middle are just heaven for cruising around.