Are All Blu-ray Players Created Equal?

[ClinicaTerra LTD]

Are there major picture quality differences between decks like the typical $500/$600 Panasonics, Sonys, Samsungs, etc. and the decks like Denon's new $2000 flagship -- the same way there are differences between cheap and better DVD players?

I'm wondering if the not-so-hot picture quality and experience I'm seeing on my Panny '10A is the actual player's performance capabilities, or the fact that something like the new Denon, with its Reon or Realta chip, will actually make Blu-rays look tremendously better if that's even at all possible...we know these Reon and Realta chips are great for DVD upscaling improvements, but do the prices of decks like the Denon justify the actual performance they exhibit? Are expensive players like these Denons really going to make the Blu-ray discs look "better" than if they are played on a $500 Panasonic or Sony?