panasonic plasmas are a little cheaper than similar sized quality LCDs. don't skimp. LED's are great if you have money to burn on a good one, most of the affordable ones aren't even true LED television, they're side lit LCDs.
i have no motion issues w/ my LCD, it's a 1080p Sony w/ 120Hz processing. this television has withstood several PAKs.
dark room, no windows/little glare: plasma
windows, possible glare issues: LCD
don't even worry about the calibration disc, just go to AVS forums, find the calibration thread w/ your specific model, then play around with a few different people's calibrations, see which one looks best to you. you can discern which configs are the best by reading the threads and just start with those.
and don't buy expensive HDMI cables, just buy one from monoprice.com