pc to dac?


Ok I have been to a couple stores and talked to some people they seem to push me to what they have not what is the best. I want to start using a PC or Mac for a source to a DAC. Right now I use a cary 303/300 which I like but can I get the same or better sound out of a dac and pc? What is the best set up. I would like to stay under 5k for the dac 3k would be better but tell me what I need to spend. I guess if I get a DAC also I could dump the cary 303 for just a cheaper transport, correct?

My system is
Vandersteen 5a
Aseticx clyspo tube pre amp
quicksilver v4 tube monoblocks amps
programmergeek
Thanks for the feedback, I was thinking of a USB connection but if there is a better way I am open to it. Also the DAC would have to be balanced and would I use one dac for the pc and transport? Or just use the PC as the transport?

I feel for you every one I ask has no clear answer and I have gotten answers like going wifi which is just totally unaccaptable to me ( i am a computer person no way wifi will work well ) to this is the best solution but evey one has a way different opinion.
The Computer Audiophile online has a lot to say on this. The mac mini appears to be the most recommended CPU. People claim to be able to hear the difference in its USB ports and if you can believe it- power cords to the CPU. He likes the Berkley Audio DAC if you need volume controls or Bryston's new one if you don't. Personally I feel he has his act together sans product affiliation- IMHO of course. All in all this is a difficult research item. There are lots of variables if one is to directly compare outcomes. What CPU, what OS, what type of rip, playback software, 6+ types of connections, hard drive connections not to mention that a manufacturer may not implement the connections the same way (if people can hear the difference between USB cables, then the usb conversion itself must be important).
I am purchasing the Berkeley Alpha dac. But I also need a really good Sound card in your PC. Ihave an Audio 24/192 but was adviced to get a Lynx. The Berkely is one of the best I have heard & the cost is very good for what is does do.
A used Bel Canto DAC3 would work great and can be had for around 1500 used. You wouldn' t want to use the USB in that however. But it has all the other connections.
Just as there are many approaches to app dev and implementation in IT, there are several options in implementing computer audio as already mentioned, especially with your price range. I can't recommend a specific solution to match your Cary 303/300 if that's the standard you're aiming. But I can recommend the DacMagic and use it for both your PC and transport at the same time, and it has balanced output.