I'm currently trying to decide between the 2009 and the 2010 Trek 7.2 FX. The cost difference is about $75. From reading the forum, I see that the 2010 7.2 frame has been upgraded to the alpha black, but what exactly does this mean? This is my first "real" bike, and I'm just using it for low key commuting, getting around town, and maybe the occasional moderate length ride. Is the upgraded frame worth the $75 difference? How do the weights compare between the two?