You'll want to set your Windows resolution to 640x480. To do this, you need to do the following:
Right Click on Desktop --> Properties --> Settings --> Advanced --> Adapter --> List all modes --> 640x480 True Color (32 bit) 60 Hertz --> Apply --> OKAfter that your desktop should be set to 648x480. You will also want to set it to your primary (or only) display. At this point, or even before, you should set your preferred front-end to 640x480 as well. Now, when you fire up games you'll notice that the edges of the screen are cropped or that the screen is way off of center. To fix this, simply change the MAME cfg (.ini) file.
Set the resolution to 640x432. Yes, 640x432 is the correct resolution for component inputs. If you go higher, you'll get part of your image cropped due to overscan. Again, 640x432 is the correct resolution setting. Save the cfg file, fire up your front end, and enjoy the closest image you can get to an actual arcade monitor with a TV set.
Example Pics:Vertical Games look nice...
So do horizontal ones.
Close up shots.
Any bluriness can be attributed to my lack of a tripod and poor photography skills.