@rabindranath72
There's no absolutes in regards to Amigas and tvs/monitors unfortunately, but generally 30ish khz modes will be fine for most modern screens. 15khz modes however (what 95% or so of custom chipset based games use) are a mixed bag, both in regards to success and quality of image.
More often than not however if a display has scart it'll display 15khz modes. Composite will also work @15khz, but the image of the a1200's composite output is far from great. An a520 modulator will give better results if you find yourself needing to resort to composite.
