Thanks so far... to everyone.
actually a 'stand alone' system is the aim. No iPod dock, no dedicated DAC, no dedicated int amp or receiver.
So active speakers, and a USB or fire wire sound card that is a step or two up from what I have now... it's nearly ... well, it's old IMO.
If the sound card has SPDIF out, fine. if not, that's fine too.
Self contained stand alone, high value, not high cost.
Some sort of arrangement for $< $400 or so.
I'm blessed to have plenty of junk around to integrate any of my desktops into... preamps, receivers, DAC, converters, but prefer to go with a pc rig that needs no other assistance.
If, this proposal by todays' standards IS NOT CAPABLE of showing a noticeable measure of performance as opposed to what I have now... well, just say that.
I figured $400 - $500 ought be plenty to spend on a desktop sound system... if not, do tell.
Thoughts?