Water Bottle Seat Mount for Cannondale Slice?

Hi All,

Any slice owners out there that can recommend a good water bottle cage set up for behind the saddle? I plan on using the mount that came with the bike (unless someone has a good reason not to...) so I guess I just need the cages. I've only been doing oly and shorter races on mine but I have a half coming up and will need the extra cages. Thanks!