I've got to agree that you are asking a question which ONLY YOU can answer... You can go to the manufacturer sites, and listen to the best it can be played (mostly!), tweaked and polished to perfection.

Listen to all four (Y, K R & Ktron) and decide for YOURSELF what sounds the most real. Then go to the user sites, and listen to a bunch of user demos. How real do THEY make it? Now, you've got a pretty good idea...

But, be careful. You are actually deciding which ones sound LESS fake, not MORE real Things are getting better, but I still don't think we've got to the point where anyone would ever be totally fooled. Perhaps the Audya gets closer in the rhythm section, but it's still a long way from completely convincing anyone it's REAL....