I have a T260HD (Bought it for 388 off ebay with live.com cashback). Its nice as a monitor/TV, but the TN panel leaves viewing angles to be desired. I still think my Dell 2407 looks significantly better than the T260HD when it comes to computer use. Also the T260HD requires alot of tweaking of the settings before it really starts to shine. The internal tuner works quite well however, and with some tweaking you can pick up some beautiful HD feeds on it. The sound is nothing to write home about though, but still for the price its a great screen and works quite well. Keep in mind this is a 16:10 panel, so even when it tunes an HD TV station it will have black bars on the top and bottom in Just Scan mode.
I also have my PS3 hooked up to the T260 and it looks pretty darn great, but Ive had the ps3 less than a month and have been busy so I can't fully rate it. Still uncharted looks and plays very well on it.
The difference between the 240 and 260 is just 1.5 inches. I would say its worth 30-50 bucks for the bigger screen, but it depends on the buyer I guess