I am a dealer for Bluenote and Resolution Audio, two of the best players at their prices (under $10k league) that take slightly different approaches. I will start by saying I have demoed many of the greats out there and these two players offer the best in their respective categories.
Long story short, the Bluenote is the most well balanced player out there and the most organic sounding. Meaning, no digititis, very liquid and non fatiguing. It is not however the last word in low low bass, but resolution is very good and is absolutely addictive to listen to. Once you listen to it, it is like a drug.....you cannot stop.
On the other side, the Opus 21 is very musical, but also very very transparent and dynamic. It is for the guy who wants the last bit of detail and dynamics. Which one to choose depends on your gear and music preferences. Feel free to contact me for options!!