Keep in mind that these servers are not intended for this audience (although some of us own them). I have a Kaleidescape and will be taking in the new Escient Vision (if/when they bring it to market) to go with my Escient MX-531 music server. These servers are for the "custom" market. While they do provide nice audio/video signals, I still keep my G91 (soon to be G92) and Marantz DV9600 around for critical listening/viewing.
The servers are great for whole home music or managing your DVD collection. With whole home music being piped throughout your home via a 45-60wpc amp and played at relatively low(er) listening levels, it doesn't need to be audiophile.
As for ambient noise, the Kscape is very noisy (fans) and doesn't belong in your room. The Escient is quieter than my CATV DVR (by 50%).
BTW, I'm supposed to see our rep for the Sooloos products and will report back my findings.