Congrats! I test rode the Madone when I was looking at road bikes and it was a really sharp looking bike I wanted to fall in love with, I ended up getting a Specialized Ruby for a really good price and preferred the relaxed geometry a little more.

Bike computers... I bought a Bontrager Node 1 computer (Node 2 includes the HR strap) and it does everything I need. The Madone also has either a SpeedTrap or DuoTrap, which is a formed space in the front fork for the sensor, making installation much cleaner/easier as you don't need to zip-tie the sensors onto the bike. You can get much fancier with the Garmin, etc models that include GPS and some cool features like elevation and a nifty touch screen.

Shannon