My $.02.... You are buying a bike, not a shop, especially for a tour bike. When you need something fixed, you are not going to be at home anyway.
If you can, ride the Trek too, then you can buy it elsewhere if you really hate the shop. There are a few on ebay. Once you have it, any shop can work on it for you.
Don't forget to consider frame material. Steel is a smooth ride, especially loaded.
The canti breaks and STI shifters on the cannondale are not as good a setup as the V-Brakes and barend shifters on the Trek.
On the other hand, the c'dale's stock gearing is more appropriate - but it's cheaper to buy 3 new rings for the trek than a whole new brake/brake lever/shifter setup.
(can you tell I have a trek?)
Happy shopping!
Anna