Thanks for the quick reply. Ok thats strange then as the bad picture quality was before i even put a game in, the cable in question worked fine when direct to TV. The only thing is that cable was inherited via a dreamcast bundle a bought a while back so cant imagine its anything special. Will wait for PS2 RGB Scart to arrive before i worry about that any further.
As for the HDMI to DVI, yep i changed that. The monitor was getting something as usually it powers off if it has no input but the screen was just black. I have another monitor i am going to try later to narrow that issue down then.