These days, with as many similarities between bikes in the various price ranges, very often the best option is the one you enjoy looking at the most. My first bike, which I got around your age, wouldn't hold a candle to the Claud Butler you are pondering but I still somehow managed to get 2nd place in a major bike race in my area (and without a junior license I was racing in the entry level men's category!)
Here is an online review (but take these things with a grain of salt): http://www.bikeradar.com/gear/category/bikes/road/product/review-claud-butler-criterium-09-34867
It suggests this is a fine handling bike for the price range. If you are getting the 2012 model you won't have the stem mounted shifters which they harp on a bit. And don't worry about the lack of a triple chainring they seem to take issue with as well... it's a road bike!, and triples are for mountain bikes and old men anyway [IMG]/img/vbsmilies/smilies/wink.gif[/IMG]. They say it's no lightweight but I'm going to go out on a limb and say that holds true for most bikes in the price range. That's also probably a sentiment coming from reviewers who get to ride very expensive carbon fiber lightweights a majority of the time.
Good luck with whatever you decide on. I'm not that familiar with new bikes in that price range so couldn't say for sure it's the "best". You mentioned you saw it on some websites, try and get a test ride if you can to make sure you like it. I didn't really test ride my first bike, and test rides help the most once someone has experience with a few different bikes, but it never hurts to make sure when you are spending a lot of money, especially to make sure it doesn't feel too big or too small.