Hey everyone, I've got some Christmas money to use...and I'm thinking about getting some more filters for my Nikon D90. I'm an amateur photographer for Highschool senior photos mainly. I shoot outdoors, and I'm wondering if there are any filters that you would recommend to help enhance my photos? What I have in terms of filters right now is pretty basic: UV filters (to protect lenses) ND stop .3 Circular Polarizer I also use Adobe Lightroom 3 to post-process just FYI. Thanks!