Go for an Avid Juicy 7. I had one a while back and I loved it! Sooooo much modulation, expecially with the Gothic rotor I had on there. It also has a TPA on the lever, just like a Magura which means you can set it up exactly how you want it. Can be found at CRC for just over £100 I think. And I think the new Carbon one's out now which is supposed to be even better. Oh, and I did a review here.