If you are going to make the switch to 9 or 10 speed that would actualy cost a bit. But with what they said about the trekking bars that could be your first shot and you can keep your original stuff. If not im sure there are people that have 8spd brifters lying around't that they wouldn't mind selling you. I actually have sora 9sd brifters (ugraded to tiagra), and my tiagra rd and sora rd lying aorund now (for 9sd double). But if you do make the switch to 9 or 10 spd you may need to look into getting new cranks also. I am almost certain that my brifters would work for you in a 9 spd set up but my derailers would not as it looks like the sirrus has a triple set up.