Be careful here. I'm not sure if it's actually worth the $3.5 k. For a lot less you can get a rackmounted PC and an external AD/DAC, whilst having more processing power *and* the ability to upgrade the computer when needed. The buttons on the front can be replaced with about any MIDI controller, and you can connect to and control the machine using Windows's Remote Desktop or TightVNC (sorry for geekin' here, but especially Windows Remote Desktop is *very* easy to set up and use).
All they say on the website is "it has a Pentium-class processor", which is equivalent to saying "this car has an engine built after 1993". You know it's not ancient, but that's about it.
At least get it demo'd before purchasing.
... in bed.