If you're not sure you want to stay with Nikon, then I'd hold off on buying ANY new lens right now. As it is, you have a LOT invested in Nikon gear. You'll lose a lot of money if you try to sell off everything you have in order to switch to a different brand/system. I have the 85mm f/1.8G and it's a fantastic lens, even on a DX camera. At a 127mm FX equivalent and 1.8 max aperture, it's an awesome portrait and indoor sports lens. A few years ago, I was the 2nd shooter for a large indoor wedding (200 guests) and that 85 got me some great shots in a VERY dimly lit ballroom. The bride and groom were very pleased with the pictures I took. You can't go wrong with that lens.