I did it finally! I bought a new bike. It is the Cannondale Synapse, an all carbon bike with a very sweet ride! I took it on its maiden voyage on Sunday- Tour de Tahoe, a 72 mile ride around the Lake. With the exception of my numb toes, which I attributed to the 25 degrees at ride out time, the ride was extremely comfortable! At some point I will take it to Curtis Cramblett for a professional bike fit, but in the meantime it feels really good. And it weighs a whole 17 3/4 lbs, compared to my 23 lb R600 its a whole lot like riding on a feather.
I think I'm over my cycling burnout now...