Universal disc player

I am looking for a universal disc player in the under $2000 range. My preference list so far consists of the Marantz DV9500, Onkyo DV 1000, Denon DVD 3910 or the McCormack UDP-1. I am leaning towards the Denon because of the ease of upgrade mods that are available for future tweaking. Could I get some opinions? I really want video upscaling, fantastic Red Book and DVA-A, SACD playback. Which is the best of all worlds?? Thanks for any help.