Due to an unexpected windfall, I may be in the market for a new display for my HT within the next few weeks. Currently, I have a Toshiba TW40x81 which has performed flawlessly since I bought it, but I want to upgrade to a new display for a few reasons. 1. No more convergence drift, focus and geometry issues. 2. I want to finally take advantage of HDMI for a pure feed from my HD-A1 (and maybe even a new BluRay player). 3. Upconversion of my existing library which I cannot currently accomplish via component from the afore mentioned HD-A1. 4. No more internal light issues (no need to matte the inside of the cabinet). 5. No more dust on the lenses. 6. No more freakin' spiders between the guns and screen! I have done some research and it would seem that plasma is much preferred over LCD for critical HT viewing. (A special thanks to GeorgeAB for the tip about resolution loss on LCDs during action sequences! ) I have seen some of both which look pretty awesome and I'm going to look at more today. I've just about settled on getting a plasma but have a few questions. I have a budget of $1200 max, but would like to keep it close to $1000. I'm staying away from the el-cheapo likes of Insignia, Vizio, Sanyo, et al and sticking with tried and true brands with good warranty coverage. I've heard some good things about LG, but have had nothing but quality trouble with LG in the past so they're out of the running. Right now, I'm looking at six different models, three of which are Pannys and three are Samsungs. The Pannys have a refresh rate of 480Hz compared to the Samsung's 60Hz. Why such a big difference? Here are the displays: Samsung PN42A410 42” 720P Samsung PN42A450 42” 720P Samsung PN50A450 50” 720P Panasonic TH-42PX80U 42” 720P Panasonic TH-50PX80U 50” 720P Panasonic TH-42PZ80U 42” 1080P How much difference between 1080 and 720 on both a 42" display and a 50" display would I be able to discern from 6 feet? I'm going to use my eyes the best I can, but is there that much difference in discernible resolution from that distance? If not, I'd be happy with a 720p display for less cash. I'd really like to go up to the 50" display, but not if there's a huge resolution difference. 1. After a proper break-in period and calibration, what's the life expectancy of a plasma nowadays? 2. ISF calibration. I have never had one done on my Toshiba, I just relied on Video Essentials and made a few geometry and focus adjustments and disabled the SVM circuit on my own. Besides greyscale, what else can be adjusted by an ISF calibrationist which I cannot already accomplish? Thanks for any advice you can give!