i ride the ruby comp and I love, love, love it. The smootheness of riding full carbon after 10 years on an aluminum frame is just heavenly. Since I went from riding a hybrid the 105 was a huge improvement for me and I did not feel the need to upgrade to ultegra or dura ace. Since I have done mainly tri training and not straight biking I have fewer miles in than you are describing - probably only 800-1000 (I was really focusing on my run this year) but have no problems, except when I wear tri shorts (very little padding). In normal bike shorts - mainly shebeest triple s - I am a happy camper with the stock saddle. The compact double also served me well, as we don't have much in the way of hills around here.