I'm thinking about adding some filters to my photo gear and I'm wondering what everyone thinks about them. I'm thinking of going with a Cokin P series set up with a couple dif. sized adpt. rings so I can use them on several dif. lenses, both film and digital. That seems to me to be the most economical route to take, but I would like to know your thougths. Do you filters very often or do you use the computer to recreate the filter in post processing? What ones do you use? I have polorizers and UV filters already, but thats about it. I think I would start with some graduated nd filters, and maybe some softening filters but there are so many choices that it becomes a little overwhelming...