Which DAC would fit me best?

I'm using the DAC in a Behringer DEQ2496 (I also use it for room correction), and the same DAC is available in the SRC2496 (whcih I am also using) for $200 new in the US. It does require use of balanced XLR to unbalanced RCA adapters since it is a pro audio unit. There are certainly better DACS out there but I like the sound for the price.

Thanks for mentioning the Little Dot MkIII headphone amp, I was unaware of these, looks really interesting for $200. I have a pair of Grado SR325 phones, the headphone output on the SRC2496 is OK, but it uses a lower quality DAC than the main analog output so it would be nice to have a better sounding headphone amp like the Little Dot.

The DAC1 from Benchmark has a good headphone amp. I'd get that if I were looking for a cheap DAC to use with high quality headphones. I doubt you will find it used for much less than $800 though.

Used Benchamrk Dac 1 w/o usb - cheapest I have see here though was $675. Definately worth it if you can swing it.