Thanks. I haven't heard those servers. I like the Emp. Audio stuff, because it lets you use your own PC and DAC. However, it's not a self contained solution like the McIntosh. If you like your Casablanca DAC, an easy solution is to send your PC's digital signal to the Casablanca using a USB-to-digital converter. Otherwise, there are many options, like USB DACs and others. Some people here like Wavelength and VRS.
The Thor and Exact are not connected - separate circuits. Never tried plugging them together. The Thor is just for my digital front end, and the Exact is just for the plasma and DVD player. The amp plugs straight into the wall. I've tried plugging the amp into either unit and thought there was a slight reduction in sound quality, especially with the Exact.