Either cards are fine really. Both are good cards, choose the one you like the most.
Having a 144Hz monitor will help you see "more" when over 60fps. If you get less than 60fps, it will look like a normal 60Hz monitor.
For recording, it will depends on the framerates you get at the time of recording.
So the monitor will benefit you more visually but for recording, there isn't much difference really with a 120Hz or 60Hz.