I currently have the SCD-777ES, Oppo105 and the PSAudio PWDII DAC. Of the three, the PSAudio is probably the best sounding DAC for the money.
there is no best anything in a price range. there are on compromises. if you want richness fin a dac with a sensitive tube circuit. I suggest you listen to many products in your price range. you will learn what is possible.
just a reference point, the mhdt products are nos dacs--rich, but lacking in bass. the modern tube dacs, which are oversampling, like the eastern electric, are extended , top and bottom, but lack liquidity and bloom.