I agree 100% with the thought of saving your money and buying something nicer. I bought an entry level road bike two summers ago and wished I had gotten something better from the start. A good setup will be pricey, but if you think about how much it will break down to every time you ride it, it comes out to a damn good investment. I have heard so many stories, and experienced it myself, of people who bought a cheap bike to see if they like the sport and then only wish they had spent the extra money on a nicer bike. You'll get addicted, quick. Do it right the first time and you'll be happy!
Check out
http://bikeforums.net/ and
http://forum.slowtwitch.com/ and there are plenty of people there who will offer great advice on bike buying.