I really think the Benchmark DAC2 is the steal. Yes, there's a DAC3 but even they feel that's getting into diminishing returns. They really know what they're doing, have impeccable credentials in the recording industry, and you can have what many recording studios use in your home for a pittance with a used DAC2. It's just a little black box filled with superb engineering so it has to swim upstream againgst the audiophile ethos of magic and jewelry, but it does its job superbly.
Full disclosure, I had their DAC1 and DAC2 and thought the DAC2 was better. Then got the upgrade itch and got Terminator1, then Terminator2, but I have nothing but admiration and respect for Benchmark. Sometimes I'll swap in the DAC2 and it always sounds good.