Both wheels on my BikeE RX were shot, so I'm having them built with disc-compatible hubs as the bike has disc tabs on the frame and I've never been really happy with the way it brakes. I was thinking about using a mechanical set like the Avid BB-5 or BB-7 and just using the same brake cables. Is this a bad idea? Is there any advantage to a hydraulic system for an on-road bike? The run would probably be similar in length to that on a tandem.

Is the BB-5 a good set or is the 7 or some other better? I see the 5's pretty cheap now, but I don't want to go the cheap and unhappy route.

Thanks,
Mike.