Msi_Junu :
I noticed I have a thing called LED Motion Mode on my tv that supposedly boosts it to 120hz. It is really nice and unique but picture is way too dark in that mode and you cant up the brightness enough in that mode to find use of it - that plus like you said its probably only interpolated. I use it at the normal 60hz.
I have a Sony W650A 32". Maybe I'm doubting my self but this tv might as well be called a tv/monitor. It is reviewed by many as pretty much a top of the line 32" tv you can buy when it comes to picture quality, dark levels, contrast, bright room performance etc. You can literally set this tv in the brightest room and still get great picture. It has 32ms of response time (which is pretty much the lowest you can go with a tv) in game mode. I know its not very good but neither horrible.
To be honest this tv has very good color - sharp, crisp and looks like any monitor at windows screen and if not exact then pretty darn close. It also has 12bit color production or something like that.
I've been playing a game recently called The Evil Within and its quite something just plain eye candy. Been playing it in game mode which has the Black Corrector on Off, Adv. Contrast Enhancer on Off, Detail Enhancer on Low, and Edge Enhancer on Medium as well as dozen other settings like Reality Creation for adjusting fineness and noise for realistic picture.
It also has this thing called Auto Light Limiter which controls the backlight to reduce excessive brightness which is great for regular surfing on the web.
The only thing bad about this tv is the price. It is expensive at around 550 retail for 32". Got it for 450 on sale but its been discontinued shortly after I bought it. Expense I guess.....
I'm glad you are happy with the screen you are using, but I wouldn't encourage others to do the same.
Brightness is rarely a problem for TVs or monitors. Most people rarely want to use it in a brightly lit room, so a brightness setting of 50% is pretty normal.
Minimum black level is usually more of a problem. Traditionally Plasma TVs excelled at this but some LED/LCD TVs aren't too bad.
Contrast is usually pretty poor on a TV though. Dark shades tend to be crushed and detail is lost.
Typical computer monitors have 8 bit color or 6 bit + FRC.
Professional monitors have 10 bit colour or 8 bit + FRC, but to actually take advantage of this you need a work station graphics card and specialised software.
Your TV probably has the same colour depth as a typical monitor, but where it suffers is in deviation from the correct gamma and color gamut. It probably looks fine in your lounge room, which is what it was designed for but put it next to a good IPS monitor and you will notice the difference.
Typical response times for IPS monitors are around 5ms to 8ms. TN monitors are often 2ms. This is also just part of the input lag. The response time of the TV may be 32ms, but the total input lag will be over 60ms. At 60 FPS, this is more than 3 frames delay.
The benefit you do get from using a TV as a display is large screen for a low price. $550 may be expensive compared to a typical 24 inch monitor, but it is cheap when compared to a decent 32 inch monitor, or even a good 27 inch monitor. Unless you are sitting on the couch watching it from a distance though, you are better to buy a good computer monitor.