I do not advise to buy a new bike from scratch ... this might just be a crazy dream and you might after all not like to bike as much as you thought you would.

Get a cheap second hand old crappy steel bike first.
This will help you HTFU faster and will give you an excuse to totally suck at first

Then ... work your way up from there and you'll see how it goes.

Maybe you don't like cycling at all and become a soccer player or something silly like that.
Maybe you actually like mountainbikes better.
Maybe you end up like me on a TT-bike.
Maybe you win the TdF in 2015.

Upgrade as needed.
A computer doesn't have to cost $60 btw... you can get one that works fine for $20 or less.