I also second the Millenium 2 if you can find one (maybe a Millenium 1 too). If not, you can buy a new Ack dACK! for that same amount. They are also excellent with a different feel and design approach. I am not familiar with the Adcom, but the dACK! should be superior to any mass market product in that price range (I would actually consider one if you are spending less than $1500-$2000). Like the EVS Millenium DACs (were), they are handmade and sold direct by the designer. They use quality parts that no mass market item could afford to use in that price range.
