Okay - so I've been wanting a new lens for a while now...but I dunno which would be best.. I've had my eyeball on the Sigma 30 1.4, 85 1.8, 300 4, a macro...or a fish eye. Price has to be under 500ish new or used. My current line up is...D300 and D50 35-70 2.8 12-24 4 18-200 VR 50 1.8 70-200 2.8 sb800, sb600 Keep in mind I have most of my focal range covered... I shoot a lot of people, and landscapes. My photog money maker is weddings...so a fast prime would be awesome, I think.