Read the AVS Forum and those links posted by CF and NCX...spend some time digging through the topics; (there is no "quick read" or 5 easy pieces on that site, however, lol!)
In the end, buy what fits your need/uses/budget/practical setup space and don't 2nd guess yourself. Asking about LCD vs LCoS vs Plasma, with sub questions on RP vs DV,etc. is like asking for a great stock pick=1000 freaking potentially good answers.
I've spent hours reading/perusing/BM'ing/taking notes on the AVS site and it is enough to make most heads spin...one can find great info/opins there, but the "I chose another brand/type, therefore your pick sucks" gang is at work there, too, imo.
In reality, these higher qual/HD bigger screen TVs have become $1500-5000 appliances and the "history" is not really written for them, yet. But, I would not wring hands or spend months making your pick when you do pull the trigger.
In the old days, lol!, no one tossed a TV...it just got relegated to another room or a kid going to college, etc. I have std CRT TVs from 30 yrs ago that still "work".
My 2Cts.
GL,md
TheOl'
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