1) I'll let the Canadian Members answer about the dealers. 
It's a Panasonic Plasma... NOT a rebadged Dell.
Dell USA used to sell Panasonic Plasmas few years ago.
2) For closer viewing distance... YES.
Much less Screen Door Effect due to smaller pixels.
If you sit 8 feet or more there will be a liitle/no difference.
3) 40 1/8"
For most people the pixels start to disappear around 8 feet on the 42" ED.
So If your viewing distance is 8 feet or more get the 42" ED.
.
Check Out the all-new BruZZi's Panasonic Plasma FAQ
The FAQ plus links to Plasma Stands, Wallmounts, Murals, Lifts, Speakers, Frames, Bezels & More.
Also links to Audio/Video Faqs, Comparisons, News, Reviews, Shootouts, Tutorials, Tweaks & Many More.

It's a Panasonic Plasma... NOT a rebadged Dell.
Dell USA used to sell Panasonic Plasmas few years ago.
2) For closer viewing distance... YES.
Much less Screen Door Effect due to smaller pixels.
If you sit 8 feet or more there will be a liitle/no difference.
3) 40 1/8"
For most people the pixels start to disappear around 8 feet on the 42" ED.
So If your viewing distance is 8 feet or more get the 42" ED.
.
Check Out the all-new BruZZi's Panasonic Plasma FAQ
The FAQ plus links to Plasma Stands, Wallmounts, Murals, Lifts, Speakers, Frames, Bezels & More.
Also links to Audio/Video Faqs, Comparisons, News, Reviews, Shootouts, Tutorials, Tweaks & Many More.














