I chose the panasonic 8000 and im very pleased. Im using a 130" screen the blacks cannot be any darker, the 3d is draw dropping, super bright. My room is completely black. IMO at this stage all projectors are very close givin certain models, its more about the bells and whisltes. ie comparing the panny 8000 to epson 6010. How much diff. can there really be? Maybe for critcial viewing but lets be honest after a few minutes watchig a movie your brain will fill in the colors or blanks. As long as its a clear pic your good. Do you think one LCD tv is that much better than another when your standing in front of them at Best Buy? You pay for the name, warranty and options. Most the internal parts are the same. Its no different than speakers, in some cases its as few a 3 diff parts yet we have thousands of diff. speaker manufacturers. This is my first panasoinc projector. I have owned 2 epsons in the past. Any of those projetors would work great.
As far as the cable, I read that all hdmi cables will pass 1.4 but not ethernet. I tested this theory with one 1.4 hdmi cable (brand new) and a year old 1.3 cable (monoprice) and it passed audio, video, and 3d). I cannot guarantee yours will but I would try before you buy, perhaps other members can offer their cable experiences.
Denon 4810CI and 1913 for sale