I have ridden Dan Campbels and Peter Haydons Avid mechanical disk brakes. They are scary powerful with an XTR lever. I run a v brake,,,,,,,but if i was going to convert to disc, i wouldnt bother with hydraulic. They are sharp/scary. The power is way better than a hope mini. And a lot simpler than a fluid break. Just my honest thoughts Although none of the breaks mentioned in this thread are bad! Dave