Like I said. DX is not a great choice as the networking lets it down for the task you described. I've used the 3 for in the bath or at the piano. that would be my choice I think for that scenario. KNC is right about the fast processor of course and I don't know about the 2i personally but I hear it's the same family as the 3 / DX so would probably pass muster.
I would go for one with wifi.
Gnash is the player.