Hi Twig, welcome aboard! You sound like a very ambitious rider and I think you'll meet other folks here who have similar training goals. Good to hear that you are enjoying both running and cycling.

Now, about that bike.......

My first "road" bike was a mountain bike with slicks on it. Talk about a workout! By the time I got my first road bike, I felt like I was flying down the road. Just think how quick you'll be on your road bike if you decide to get one.

There are many types of road bikes out there so take your time researching and riding different types of bikes. Some people like steel frames (Bianchi), others like aluminum, (Specialized Sequoia) and some like the really cool carbon fiber (Trek Madone). In choosing a road bike, consider first what your budget will be (you can actually get a decent road bike for around $500 bucks or so), then how many miles you'll ride on average a week, and where. Also, do you want to ride a more aggressive road bike or an upright bike?

Next, locate a bike shop and talk to the mechanics. Developing a really good rapport with the LBS should help you tremendously when choosing a bike. Your bike guys should not only make sure of the fit, but offer support and services to help you enjoy your new ride. Also, with the '08's coming out, you might find a great discount on the '07 models. Some bike shops will also let you trade in your bike for a discounted new one as well.

Let us know what you decide and once you get your new set of wheels, be sure and post pics of your new ride. Good luck and I hope this helps.