More importantly - Trek 7 series is on the UCI approved list for MY2014 (sans BB fin) where MY13 is not (seatpost).
Trek and Scott both tall frames, which is likely going to be useful as you will probably need highish stack to compensate for needing to shift the saddle back to stay within reach constraints.
Trek certainly the fastest of your options, I think the fact that Formes site lists style first in the attributes is quite instructive...
I would need very low stack bars on an L SC7, or would have a bit more choice on an M
Based on saddle at 835mm height & 50mm setback
This would not be your starting TT position unless you already have a bit of experience, rather what you would be working to as you aim at nationals.
It seems strange for tall people to be looking at mediums but that is the reality of UCI rules and frames getting taller. Handling not really compromised on a smaller frame as your weight is necessarily pushed back.
- 3D Motion Capture and Frame Finder Software