depends on what kind of shifter/brake lever you have. The issue comes in when you want to remove the wheel. Campy brakes do not have the release cam that shimano/tektro brakes do. The release is built into the shifter/brake lever.
So if you try to run campy brakes without the correct levers, you will have to loosen the cable and readjust every time you take the wheels off.
Not the worst thing ever, but a minor annoyance and something to think about. I would go with Shimano with shimano levers (i just think tektro is a bit cheap), and campy with campy levers.
If you are running
these kinds of levers or don't care about adjusting the brakes when you remove the wheel, it doesn't matter which kind you get. I'd recommend shimano/campy over tektro though.
I don't know if you meant this, but to clear things up: Tektro and nashbar have no affiliation. Tektro is a manufacturer of bike components. Nashbar does not own tektro. Tektro has a lot of OEM contracts to save companies money over getting shimano components, and many times places like nashbar will put in an order and ask the products to be rebranded as their own.