Ive ridden the Madone 3.1 and 5.2 for 2012... most of the components are really solid. If you want to upgrade just to better your ride. You'll want to get a more comfortable saddle....and get rid of those heavy Bontrager wheels. For a few hundred dollars you can lighten up that wheelset by well over a pound, get stiffer rims and lighter weight tubes and tires. That's the most noticeable difference you will be able to make to that bike.