Budget DAC


Now that I have my vinyl collection and audio gear set up, I am now looking to put together a desktop configuration on a budget. Don't have the $$ to spend on a high priced DAC so I am looking for some suggestions. I would like to spend around $500 for the DAC. It will be paired up with Monitor Audio BX2 speakers,NAD C326 Integrated Amp and Digital Storm desktop.

I have looked at MusicHall, Cambridge Audio, Arcam etc. Also did research on PSAudio, DBLabs, Stello, Rega etc. Would like 24bit/192kHz and a USB option. Thank you for your help/guidance.
pmshow
HRT MusicStreamer II+ is very very good, IMO and the new price will leave you $150 for new music! If you can get by w only (asynch) USB.
I second Swampwalker's recommendation. I'm blown away by the performance of the basic non + unit in my office system.
I would also check out CEntrance dacport, which is a similar product.
Not out yet, but the Schiit Bitfrost specs certainly got my attention. Not to mention upgradeability down the road.