newbie needs a bike

The Trek 1500 is a good solid road bike; it is strong enough for a bigger rider and will last indefinitly if it is well maintained. You do realise, however, that it is a recreational road bike and not a performance bike; the frame geometry is a bit more relaxed than a racing frame. In other words, it is built for comfort and not for racing. But, as a beginner that should not be too much of a concern for you. If you had rather purchase a performance bike, however, take a look at he 2100; it is $350 more, has a carbon racing frame, clipless pedals and is similarly equipped components as the 1500.