Trek 2100, could be my new Bike

I am in the process of purchasing my new cycle. Yesterday I took 2007 Trek 2100 for a test ride and I felt like I was floating not riding. It was the most lightest bike I have every ridden it my life. Carbon Forks help to reduce the vibration so you feel very comfortable also the gear change was so smooth you hardly feel any disturbance during the gear change. Its perfect for climbing also handle very well during fast corners if you like to take fast corners. But the only problem I have is its bit over my budget so I ask the shop to get 07 Trek 1500, or 1000 for me to take for a test ride. I cant wait till next Friday.