One way to get a better road bike for a lot less is to buy used. It can be difficult to find odd sizes (very small, very large) though, and you'd definitely want to be able to test ride any bike you're considering buying used as a newbie, since fit is so important. Once you know the size/geometry that you need, buying off eBay, TeamE For Sale/Wanted section, craigslist, etc. become possibilities - but I wouldn't do it as a newbie.

Good luck!
Emily