If you don't notice any difference, you should be fine. One thing to note, with VGA (or any analog signal), you cannot do aspect ratio corrections through your graphics card driver. Basically, if you use a 4:3 resolution (like 640x480, 1024x768, or 1280x1024) in full screen, it would be stretched to fit a widescreen monitor. Using HDMI will allow your drivers to avoid stretching and put black bars on the left and right side of the image. You should consider this only if you play lots of old games (that don't support widescreen) AND have a widescreen (16:9) monitor.