The best DAC for the money

I agree on the Theta, but if you budget is less than a grand, a used Cal Sigma or Alpha DAC are excellent.

Since your system only had a digital source, the Benchmark
DAC-1 using balance ICs direct into a power amp would be an
interesting combo.

Having spent some time with the Benchmark Media DAC-1 in my system, just wanted to say it's the real deal.

Don't buy anything before you check this little bugger out.

Aloha.