32" LG 32QN650-B 2560x1440 QHD IPS FreeSync Monitor Expired

It depends on your computer. If you think your system can get above 75FPS in the games you like to play at 1440p, you absolutely should get a monitor with more than 75hz refresh. If the games you want to play aren't going to run at anything above 75fps on the PC you have and you don't plan on upgrading anytime in the near future, just get this monitor if it suit your needs and capabilities now.

It's all a tradeoff. A basic monitor would be 1080p, 60hz, standard dynamic range. This one is a good balance improves on all of those a little bit, but it's not the best in any category.

75hz is a nice and noticeable improvement over 60, but whether it's really important, and whether 144hz 240hz etc is better for you comes down largely to your preferences in the types of games you play. Your system will likely not run many current AAA games at 144fps at 1440p with full graphical settings enabled. It then becomes a matter of whether you want to turn down the details and eye candy in order to get a higher framerate, or accept a lower framerate in order to make the game look better.

Generally if you're playing competitive online games (cs:go, rocket league, etc) the higher 144hz+ framerate is more important. If you're more into story based games like Death Stranding, Assassin's Creed, red dead, etc, 75hz is plenty, as you'll be better off investing your money and GPU resources into making the game look better (in which case better HDR support or higher 4k resolution would be a more important upgrade in a monitor than a higher refresh rate)

Basically, think about what games you want to play, and that will guide you on what monitor features are most important to look for. But as I said above, the strength of this monitor is that it doesn't have any "bad" specs, so for the price it's a good all around option.

Yes if youre gaming you want 120hz+