Cabling interconnect questions

[HigTone]

So, I am leaning towards Blu-ray as my next-gen media, but have a couple of questions regarding specific cabling requirements. Hope someone can help out.

Currently I have;
-Samsung HL-S6187W 1080p DLP with supposed HDMI v1.0 connectors
-Denon AVR-1706 doing Dolby Digital® EX, DTS-ES®, Pro Logic® IIx, DTS Neo:6, and DTS 96/24 processing (typical 5.1 setup using all digital connections)

Possible future purchase;
-Samsung BD-P1400 or Sony BDP-S500 or Pioneer BDP-95FD (all with HDMI v1.3)

Questions;
1) Since the players and the display have different HDMI versions, will there be any real-world noticeable issues with regards to display quality?
2) I would like to continue to use an all digital connection between the player and the Denon, but am not sure about how the new audio formats will be supported. Are they even possible with my current Denon?

Thanks so much for any insight you can provide. I am really looking forward to making the leap, but want to make sure I can play everything.

(and yes, I jumped from AVS to land here)