If you're long overdue for a shifting upgrade, then you can't go wrong with the Nashbar Road Bike with 105. Shimano 105 is the little, little brother to Dura Ace, and incorporates almost all of the amazing technology found in the Shimano's highest end road group. From internal cable routing, to clean, precise shifting and the ability to handle up to a 28 tooth rear cog, 105 does it all. And at this price, we're basically throwing in a frame and some wheels for free. Except this frameset comes from a factory that makes some of the top road bikes out there, they just never got around to painting and branding it.
Ultra-lightweight 6061 alloy frame is stiff enough to race and durable enough for everyday riding
Shimano 105 shifters and derailleur deliver crisp, accurate, consistent shifting
FSA Gossamer crankset is lightweight and uses ramped chainrings for excellent front shifting
Alex AL270 wheelset is stiff and durable enough for everyday riding