I have the same problem. I have Arundel cages...

http://www.arundelbike.com/products.html

they are FABULOUS, come in all different types (yes, they are carbon and yes, expensive!) including side entry....

I lived with one short bottle and one tall bottle for a while, but in Texas heat that doesn't cut it on a long ride.

I promise these will make you twittery!

Nice bike!