Just to wade in on the side of the Hopes here…
I’ve ridden bikes with Shimano, Formula and Magura brakes before I bought a set of Hopes (M4 front, X2 rear) and I am not sure how they can be described as being under powered… I’ve managed to stop myself on some pretty steep alpine descents with relative ease (and only using one finger braking)…
What I have found is that they have a completely different feel to other brakes I have used, in that they feel far more progressive. The Shimanos I have used feel very on/off compared to the Hopes, the Formulas/Maguras not quite so much, but the Hopes feel like they have almost endless amounts of power as they just seem to stop you faster the more you pull them… this hasn’t always been the case with the others!
Before I bought them I was pondering over a set of XT’s as I am not sure you can beat the power for the price, or maybe a set of Formulas especially with the deals they have on their website, but what swayed it for me in the end, aside from the fact I liked the way they felt, was that I can get every single little piece of the Hope brakes as a spare from only a few (maybe a hundred) miles up the road… now Formula are okay with this, if you can find the parts for sale, often from Italy so I found, Magura the same if you can find the parts for sale… Shimano just seem to only want to sell you either a caliper or a complete lever assembly.
So, I went for the Hopes, and love them!
Oooops… I seem to have waffled.. I blame this very nice Sauv Blanc!