Anything but Black Burn. I'm on my 3rd Techfluid (the newest version) all of them have issues, noise, vibration, inconsistent resistance etc... Blackburn considers these issues as "features" and "normal". Well they're junk.
So KK or Cycleops. If you have the money and the noise would not be an issue I would go for the Lemond Revolution. I would if I had the funds.