Morph,
The canvas and QT player do not show what you really have in a movie file. A computer monitor and a TV are completely different, interlacing, color space, everything, you cannot judge your movie on these things.
Will your movie look better on TV? Dunno, it would, but it depends on how it was shot and how it was treated in the editing process, color correction, etc.
It COULD look better, MIGHT look better, but in any case it will look different. BTW, if you get even a decent TV it would be better than no monitor at all, you don’t have to get a $1200 Sony. But if you’re working in standard definition, don’t get an HD TV either.
Have a wonderful day.