That's the great thing about the Gon. You can buy it used and if you don't like it sell it and try something else. Out of the players you listed I like the Equinox the most.
I'd highly recommend a used Meridian 508/588/G07 or Ayre CX-7 in that price range, around 2k. Getting any better sound/technology requires a jump in about 2-3k (retail price at least). I have not heard many of these two manufacturer's competitors (Arcam, Resolution Audio, etc) but I'm sure they'd also be good for what you are looking for. The difference between a 1k player and a 2k player (used) really does make for better sound.