It really depends on your other uses.

For occasional television and movie watching, I would suggest looking into plasma. Plasmas tend to be superior to most LCDs when it comes to price vs. performance and usually offer an excellent contrast (how dark the black shades are and how light the white shades are) as well as picture sharpness and vividness of colours

In regards to cons for plasmas, they have one issue that you'll usually hear about called burn in or image burn. Basically, if you have a picture up on the screen for a prolonged period of time, it will make a shadow of sorts that is burned into the panel (i.e. If you leave a DVD menu on for a long period of time, it will make  an impression of that menu on the screen that will be visible when the screen is turned on but blank).

LCDs are great all-rounders. Depending on the make and model, most have excellent response time, varying levels of refresh rate (60-240hz), contrast and colours.

You best option? Swing by a location and take a look at the units. We have all kinds of movies and television shows on display (or ready for displaying) and any of our in-store associates would be willing to show you, first hand, the benefits of both LCD and Plasma.