I know I'm not fit enough right now, since I'm weighing in at 190lbs. I bet if I start a healthy diet, I can get down to 175-180lbs.

Anyways, right now I'm riding a completely stock 2008 Trek Madone 5.2 Pro. I was wondering what new parts you would consider worth investing in.

currently:
Full Shimano Ultegra SL
Race Lite VR handlebars
Race X Lite 110mm stem
Race Lite wheelset
Race Lite seat
Look Keo Classics (planning on getting carbons)
Race X Lite tires (thinking about getting a set of Michelin Pro Race)

Any suggestions would be appreciated