Best USB DAC for under $1000

Thanks for the info, but the problem with listening to DAC's in audio stores is that there system will be different then mine.

I have a Tri-Vista 300 Integrated with Infinity MTS Prelude speakers. I will be using a DAC via my HP laptop USB port.Most Audio stores in my area don't stock DAC's under $1K

I am waiting for a review to come out on the Marantz HDac1