As you've probably guessed, we were fairly satisfied with the Thermoflow. I do think that Vantec should redesign the fan so that it reaches it's maximum RPM at a lower temperature. In the Shuttle PC, the fan was running near maximum capacity (3346 RPM), and wasn't loud enough to be a distraction to me. The price is right as well. I've spotted them in local retail stores for about 18$ Canadian, which is only about 5$ more than generic, and 2$ cheaper than Thermaltake's solutions.
Review Link : Viper's Lair