Which paper do you use for stamping? I've heard recommendations for SU paper but I'd rather get hold of something from a shop so I know I can get hold of it easily. (Or otherwise read as 'avoiding the temptation to buy stamps at the same time as paper'!)

I've also seen Bristol Board mentioned, but does anyone know what thickness or what the actual paper is called? Any other suggestions? I'm currently using the back of paper from The Paper Mill but I'd like to know what others use.