Help me out here. I suppose I would be considered an advanced amateur. I've been part of the photo world (35mm and then dSLR) for about 25 years. I've done some weddings, senior portraits, and family pictures out of request rather than desire. I like to shoot wildlife, landscapes, and people. Should I buy a used D300 or a new D90? I'm also hoping that a full frame sub $2000 camera is only a couple years away. What would you do? Thanks.