LCD VS LED TVs

I have decided to get a larger screen to do the accounts on, for the office pc.
I set out looking online but then decided I should look in the local stores. You know all the common ones, PC world Comet and Hughes, Bennett's and Staples and believe it or not Sainsburys. As this would give less aggravation when returning the item if a fault occurred.
I had set a size for the screen to be at least 22" but not no larger than 24" otherwise it would look to big sitting on the desk.
Any way I found one from Pc world best price 23.6" no TV freeview or DVD player combi. Dont need the tv or DVD player combi anyway as the PC will provide all tv playback and live etc. when connected to internet in the office.
Any way the best value was £129.99 AOC monitor LCD.
That brings me to " whats the difference between LCD and LED.
I found after searching the net a great little video which explained all. See this its good knowledge. Basically, the led is better as it back lights the LCD giving a bright white and deeper black, ie a sharper picture. Not much use in the office but great knowledge.see http://www.youtube.com/watch?v=U0cBsVaCmcQ&feature=player_embedded (type in the www. bit)