Your bike is designed for Dale's Pale Ale or Bud Light only on the seat tube. I agree that Dale's is one fine brew in a can. No, really, they should have put one of the bottle cage bosses below the front derailleur mount-it usually works well there and still allows for a bigger bottle...but, nevermind...

If you are ready to explore with other cages, you might consider the one made by Velocity. Not nearly so space agey and blendy with the frame, but they have some adjustability in how they attach so you could get it a few mm lower on the seat tube and probably have good access that way. The only side-access cages I have seen don't impress me.