okay since im pretty much new to road cycling, im just getting a pretty (okay very) crappy bike to start out with, and work my way up as I get more exp, and money etc..So here is the bike im going to start out with, let me know if there is anything (besides a whole new bike) that I should start getting for this bike, and then I can later use these same parts an a better bike in the future...


Kent GMC Denali Road Bike - runs around $150
• 57 cm Aluminum frame is strong, responsive and light
• Features Shimano 21-speed drive train
• Revo Twist Shifters for easier gear control
• High-profile alloy racing rims for added strength and aerodynamics
• Alloy braking system and 700c high-pressure tires

Very lame description i know.. but anyway..
From my understanding I should get a whole Tiagra (or Ultegra based on how much i wanna spend) components on this, what else should I get and put on here?

thanks again guys!