Motion looks like junk on both my LED and cheap LCD Tv's.
I just sit back far enough to not notice it.
If you sit too close you will see pixels.
I have a changhong 50 inch and a best buy house brand 40 inch.
Both were under 300 bucks new.
The LED looks more bright and overall better than the LCD, but the old school plasmas look very good.
I prefer a standalone roku device, they are like computers they age.
The older Roku's run apps terribly, they need to be upgraded every couple years.
My newer roku runs circles around the older one, and the apps are more dynamic looking.
I would not want an embedded roku, or any apps embedded in a tv unless they had frequent firmware updates, and I"m guessing TCL does not do this.