Don't worry about your graphics card, it's fine. The Hyundai monitor is really nice but I think what this mostly comes down to is your preference between Widescreen and Fullscreen. Because their features are nearly identical.
AG:
500:1 Contrast Ratio
4ms Response Time
Widescreen
Hyundai
700:1 Contrast Ratio
8ms Response Time
Fullscreen
I will speak from personal experience, that once you go Widescreen there is no turning back. Widescreen is absolutely wonderful to have for watching movies and the feel of a much bigger screen area. You might ask why widescreen... Just consider where your eyes are on your head
It makes sense