Depends how much you want to spend.
In 2002 & when plasma prices were in the thousands I spent about £600 to buy a now archaic 36" Panasonic big box conventional tube TV. Although not a thing of beauty it had a good enough picture.
We must have been one of the last households in my area to by a flat screen when we upgraded at the beginning of last month to a Panasonic Viera
TX-P42X10B which I was lucky enough to source on clearance from Richer Sounds for a mere & very reasonable £350.
I know it's not a 2010 model or even 1080 but opinion seriously varies re 1080 benefits over a decent spec 720 outside of gaming.
Have a look at Play.com & for great clearance deals & service try Richer Sounds.
£579 buys
this 50" Plasma Seems a bargain if you are prepared to ignore the LCD / 1080 hype & save yourself not far shy of £1500 over an equivalent 1080 model albeit I've not not read any reviews.
I like the slim look of some of the LCD's but am very happy with our TV - Ironically as squeaky2's post confirms I have bought my Plasma at a time when some with older Plasma's are changing to LCD or even 3D.
I have seen LCD's & Plasmas demo'd & I researched prior to buying. Personally I like they way a good Plasma handles blacks & how it works with larger screen sizes.
I cant stress enough the importance of doing research on the AVForums.
Finally I would add that many spend a fortune on out of the box kit & then fail to position kit properly, fail to correctly position & set up time delay on their surrund sound, fail to set up TV picture settings properly, use cheapo cables, ( I wonder how may use a decent HDMI lead rather than the rubbish that comes with a Sky HD box)), or perhaps watch with bad eyesight yet not wearing glasses. I am a great believer in making the most of what I buy. (just as I dont see sense in those who spend a fortune on shirts they don't iron or cars they don't drive or maintain properly).