I'm 55 and just got serious about cycling a couple years ago. Bought a Trek 1.2 and did the Nebraska ride (BRAN) a couple times and an unsupported 500 mile ride to the mountains. Finally last March, I determined that I was a touring type of rider, so I bought a Surly LHT. I have put about 3400 miles on it since and love the comfortable ride. Have only been on my Trek a couple times since I purchased the LHT. I am toying with the idea of replacing the Trek with a different road bike, for the times that I do want to ride a little faster. I know some of the improved comfort of the LHT over the Trek can be attributed to its steel composition, but what part does the geometry play? I know I prefer the longer wheelbase of the LHT over the 1.2. Would carbon be a noticeable improvement over aluminum? Or am I doomed to choose either comfort or speed? Any suggestions would be appreciated.