need more detail about your tv usage and viewing distance. Will you be primarily watching cable? (Shaw or Telus)
Will you be watching movies on BluRay or DVD? when watching movies do you dim the lights to get the movie theatre effect?
Most sets these days are LCD. LCD by itself cannot display images without some sort of backlight. Gone are the days that the backlight was a florescent tube.
Most now are all LED backlighted LCD screens. Many of the cheaper sets use edge lit backlighting. Better sets also have what is called local dimming. Which means
they can adjust the amount of light showing thru to aid in better black levels and shadow detail.
Farther up the scale is an LED LCD with full array local dimming. Which means the LED lights cover the full rear area of the screen and are divided into separate zones.
Those zones can be controlled and dimmed / brightened independently.
next is screen resolution. Many tv sets now are LCD LED 1080p or 4K. Which is just how many pixels are on the screen. A 1080p screen is 1920x1080 and 4k is 3840x2160 and thus
is 4x the resolution of 1080. Since mostly nothing is really using 4k natively now, a 4k tv would be using 1080p or 720p signals and upconverting.
Next there is the newest tech called OLED and that is available in 1080 or 4k. The primary difference with OLED is there is no backlight. Each pixel on the screen makes its own light. (i am lusting after one of these sets

currently have a 50in Panasonic Plasma) Picture clarity and black / shadow detail on these sets is fantastic.
And lastly there is plasma. Not too many supporting plasma these days. I think only LG and Samsung are left. Panasonic dropped plasma in early 2014.
so bottom line. depends on what you will be watching and how far you will be sitting. Most broadcast tv even in HD is only 720p. Telus TV only outputs 720p.
So i am guessing you would probably be happy with a 42-55in LED LCD. And once you get the set go into picture settings and turn off "torch mode" ..usually called
Vivid.