I believe you're somewhat misinformed in regards to LED TV's. LED merely refers to the back-lighting source. A "LED TV" is a LCD but with a LED back-light. (As opposed to an LCD with an incandescent back-light.) However, you are correct in the statement that LED LCD TV's are the most current.Avoid Plasma. Low lifespan compared to others, very high energy costs. Artifacts are possible in fast motion imagery.
Avoid DLP. Older technology abandoned for other technologies.
LCD is lower energy than plasma, proven tech but no longer the top choice.
LED is the most current. There are variants of LED so check those out avoiding the others. Go for the fastest Htz you can find and afford. At this time in tvland technologies, 1080p should be the choice in whatever technology you choose.