Note: This issue finally got resolved, mostly on page two. Jump ahead- turns out this bike comes with the wrong size bottom bracket (113mm that it comes with creates a too large chain line and poor front shifting due to excess cable tension). Nashbar has agreed to send me a 108mm bottom bracket, which should resolve the problem.
I just got a Nashbar CX1 cyclocross in the mail today and was setting it up for the wifey. I needed to make some adjustments to the front derailleur, and this bike sports the Sora 3500 2x10 sti group. I made sure and adjusted the cable tension correctly (since I know too tight could cause problems). I'm pretty sure I got it right, since there's only enough tension to comfortably get the chain onto the large ring with the high limit screw removed. When I downshift to the small ring, it seems to make a very loud sound and make a fairly rough shift. I took a video of it, but I don't know how well it represents the sound and obviously you can't feel it. Is this a defective shifter, or am I missing something else? Cable routing and everything else appears to be normal. I own a bike with 105 brifters, and once owned a bike with Sora but it was stolen from me almost immediately, so I don't recall the shift quality.