I think you will find this chart helpful:
http://www.genuineinnovations.com/im...on%20Chart.jpg

I found myself with the same need about a month ago and weighed the pros/cons of a new pump versus CO2 inflation. Ultimately, I decided that the Topeak Road Morph made more sense for my needs. I sprung for the optional mount from Todson so I could still use both of my water bottles.

Mount:
http://store.todson.com/store/wb-bra...ex-tpd-2c.html