I have been looking at bikesdirect.com, the 3 or so road bikes that they offer in the 300 to 400 price range. Can anyone recommend another bike or website? What is the difference between a bikesdirect bike and a walmart road bike like the gmc denali, or a schewin? There are a lot of features on http://www.bikesdirect.com/products/gravity/avenue_b.htm and http://www.bikesdirect.com/products/gravity/avenue_c.htm that seem to be the same which is really confusing. Was is one almost 100 dollars more? Any help is appreciated.