I'm looking into getting a new set of brakes. I'm pretty biased towards the formulas after my not even 1 year old avid juicy o rings went. But maybe you guys could give some pluses and minuses of both.
I have the Formula Oro Bianco and I love them. My only frame of reference is the BB7 but i am very impressed with the brakes in terms of ease of installation, ease of bleeding given that I had to shorten one of the lines and just how nice they feel.
Another bonus is that the Formula guys hang out in the MTBR.com Brake Time forum and are very helpful. I haven't visited that forum since last summer so I don't know if the same holds true in the last six months or so, but I found that to be a nice plus.