yah thats my fear paying extra $200-300 for 3" and to not run at full 144!
Then get something with Gsync, even if less than 144hz, you'll thank me later, just trust me lol
I've done a couple in-person tests at a friends place, a 120hz monitor with Gsync looks LEAGUES better than a 144hz monitor because the 120hz matches the framerate coming out of the GPU, great for AAA titles that won't go over 100fps, or even Vsync locked titles.
Non-gsync needs to skip/double frames to keep up/slow down to the GPU, which was perceived as stutter.
Because 144hz/fps was nearly impossible to reach without using minimum settings (was using 1080ti during testing), switching the display to half the refresh-rate and endabling vsync at 72hz ended up looking better than the 144hz mode.