SVideo is still colour encoded to either PAL or NTSC, so if your amiga is PAL you will have a PAL colour encode - to over-come this problem Amiga-Mainiac developed an SVideo unit that can encode either PAL or NTSC as it takes its source from the Amiga Video Port.
However your TV set will still need to be able to sync to 50hz, so check first.
I will also point out, that a NEW project on the Horizon is the Component YPbPr converter for the Amiga RGB,
This is as Good as RGB, but requires a TV set that has both (Component YPbPr) and is 50 - 60 hz tollerant.
so check your specs =D