hey all...im a beginner and am looking for a bike. I only what to buy a beginner bike for around 3 to 400. I know right now that I want a bike that I can upgrade later but I donít know were to start. I am mostly going to use it to commute to work and go around the neighborhood...later on down the road(like a year or so) I want to hit the trails but that is when I get in better shape. I am open for suggestions...can anyone help?