harmon karan dvd 31

Does anyone have an opinion on the musical abilities of this player? it was recommended by soundstage.

I have sixpacs, maggie 12s and quicksilver pre-amp. I am currently using denon dvd player. would like to upgrade this piece. love my set up but would love to create bigger soundstage with organic feel and instrument seperation.
would there be a noticable improvement over the denon?

can anyone recommend a good tube cdp under 500 used?