Plasma has the best picture qualities!
They have the highest native contrast ratios(40,000:1), giving them the blackest blacks and most vivid and rich looking colors! They also have the fastest response times(.001ms) and fastest refresh rates(600hz), making them the best at fast motion content like sports, movies and gaming!
Plasma's are also the most affordable HDTV per screen size and no longer have problems with burn-in or energy consumption. For more info and facts, see this website: http://www.plasma-lcd-facts.co.uk/
However, you didn't specify what size range you are looking for. This is an important factor when searching for TV's. Plasma TV's don't come in sizes smaller then 42", so if you're looking for something 40" or less...LCD is your only option! Go with these brands of LCD; Panasonic, Samsung, LG, Sony, Sharp or Toshiba.
However, if you are looking for something 42" or larger, i highly recommend going with a Panasonic Plasma TV. Panasonic is the best performing and most reliable brand of HDTV i've ever seen!
Here are some recommendations for you:
This is their entry level, energy efficient model(TC-P42U1): http://www.bestbuy.com/site/olspage.jsp?skuId=9244301&type=product&id=1218066284214
This is a mid-level, energy efficient model(TC-P42S1): http://www.bestbuy.com/site/olspage.jsp?skuId=9317287&type=product&id=1218084032650
If you would like to see more, check these out! http://www.bestbuy.com/site/olspage.jsp?_dyncharset=ISO-8859-1&_dynSessConf=-4917890889582287728&id=pcat17080&type=page&lcn=TV+%26+Video&sc=TVVideoSP&st=processingtime%3A%3E1900-01-01&usc=abcat0100000&cp=1&sp=%2Bcurrentprice+skuid&nrp=19&qp=crootcategoryid%23%23-1%23%23-1%7E%7Ecabcat0100000%23%234%23%23wu%7E%7Ecabcat0101000%23%237%23%236d%7E%7Ecabcat0101001%23%230%23%233j%7E%7Ef312%7C%7C506c61736d6120466c61742d50616e656c%7E%7Eq70726f63657373696e6774696d653a3e313930302d30312d3031%7E%7Enf862%7C%7C50616e61736f6e6963&pagetype=listing
Hope this helps! Email me on my profile page if you need more help!