I've heard that VA is not that great for terms of gaming with ghosting, glare, and bad veiwing angles. How noticeable is it on this monitor?

playing cyberpunk 2077 so far on this and it looks night and day from my previous 27 in sceptre monitor. It looks great and I can truely tell the difference in quality. So if there is ghosting, its not a problem that im noticing. I paired this monitor with a 7900 GRE doh if that helps.

Is it MSI monitor arm compatible?

Yes, the MAG 345CQR supports a standard 100mm VESA-mount.

Questions & Answers: MSI MAG345CQR 34-inch 3440 x 1440 (UWQHD) Gaming Monitor, 180Hz, Adaptive-Sync, HDR Ready, HDMI, VGA Port, VESA Mountable, Tilt, 4-Side Slim Bezel, 1ms, Black

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MSI MAG345CQR 34-inch 3440 x 1440 (UWQHD) Gaming Monitor, 180Hz, Adaptive-Sync, HDR Ready, HDMI, VGA Port, VESA Mountable, Tilt, 4-Side Slim Bezel, 1ms, Black

Enjoy the most immersive gameplay with a 1000R curvature rate
180Hz High Refresh Rate
Eliminate screen tearing and choppy frame rates with a 1ms(MPRT) response time
The mesmerizing RGB lights on the back of the screen create a stunning visual display
HDR Ready. Provide eye-catching detail through contrast and shadows adjustment
Perfectly supports 120Hz at QHD/2K resolution with next-gen consoles like PS5 and Xbox series X/S

$309^.99 –