On LED v Plasma, i will suggest LED on any given day.
It saves lot of power as compared to Plasma. To give u a direct comparison, if Plasma consumes 10 units for say 10 hours, then LED will consume just 2 units for that many hours.
Next, if u r viewing
TV in illuminated environment, especially with Sunlight, then it becomes really difficult to watch on Plasma.
Then theres the issue of image burn-in. If a scene stays somewhat still for a while, then it will still stay with a shadow like effect when the scene changes!
Further, a 42" LED will support 1080p resolution, but if u want to buy a Plasma, u have to look for 50 inchers. EFFECTIVELY, UR COST WILL STILL STAY THE SAME.
Plasma according to me, is an outdated technology. Now u will ask "Y is it that so many Plasma models are being promoted?"
So my answer is, being outdated tech its cost has reduced and prices are still pretty high. Obviously margins wud be higher in that technology!
However, having said all this, Plasma is still the option to go if u watch fast paced stuff, like Action movies, Sports, etc......
Next, if ur room is large enuf, then i guess on any day i wud prefer to have 50" 1080p screen, in place of 42" 1080p screen.
----------
I checked out a couple of dealers and none of the TV LED, Plasma, LCD played regular cable as
sharp as the CRT TV. Is it because the dealer said he has shared the signal from single STB to more than one TV? my primary use will be cable for more than 50% of the time. the Demo video on these TVs were good.
Did u go to the electronic chains to check out? If no, then i reckon u shud. 1 conspiracy theory applicable here cud be that the dealer wants to sell u the CRT, which wud ultimately be a non-moving stock for him.
If ur need is a wide screen TV, u shud go for it. A 29" CRT cannot serve the utility of a 42" LED or 50" Plasma.
And to your question - i m not very clear as to sharing of single connection with multiple TVs affects the output or not. Let the others comment.