Personally, if I was able to get a new TV, one that I would hope to last as long as your cube, I would get the latest & greatest... All depends on your budget... Smart LED 3D TVs are the latest (not fond of the 3D as of yet, wearing glasses watching TV ain't for me)
I have no idea of the differences between one brand or another, but a few googles, will point you in the right direction, think cnet do some good reviews... More & more will be streaming through the TV... smart TVs are the latest technology... all this depends on your broadband speed to get the most out of it, but as you are watching more TV/flims on your laptop, then your connection speed seems ok...
Try to "future proof" things... High Hertz level (100Hz +), WiFi (and ethernet cconnection as back up), regarding connections on the TV, more connections, the better e.g. HDMI, USB, Scart (to a lesser effect) etc... I know you state that the frills aren't big at the moment, but may change later on...
If you do decide to go ahead with a purchase, let us know what you got...