I have a 2910, and have no clue what the differences between my unit & a 2900. I purchased it primarily as an upgrade from a nakamichi cd player that is 15 years old, and for SACD & DVDA. Redbook CD playback has been good, but no real earthshaking difference from the nak. Was not the improvement I had hoped for. This is not really a criticism of the 2910, more an affirmation of my nak's quality. The nak is currently in another system so needed a new cde player anyway. DVD video playback is great, but really have nothing to compare it to, as I primarily listen to music. DVDA still not that excited about, but only have 3 DVDA, Sting Sacred Love which was a disappointment, Sting Nothing Like the Sun which was ok but never had on redbook cd so really cant compare & Diana Krall Love Scenes, which is good but again cant compare to redbook. SACD playback is what has really impressed me, but seems highly dependent on the recording. Diana Krall's Girl in the Other Room sounds fantastic, but it also sounds great as a redbook (hybrid disc). Dvorak's New World Symphony was a disappointment, but ends up it's only a 3 channel recording, & I lack a center channel as I'm waiting on my center channel speaker to come in. Will add that I don't like the composition as well as the same symphony from another orchestra/conductor, so this may have something to do with it.
I have also demoed the Rotel 1072 CD player, which gets great reviews, & could not tell a difference, or any difference I heard I prefered the 2910.