(thanks in advance Jason
)
Haha!
OK Omar, as Strangle has already pointed out a GTX 760 or an R9 280/280X would be good for you and yes both are miles faster than a 6850.
I recently bought an MSI GTX 760 4GB and I am loving it. Really nice card for the money. You can also get a 2GB one which will be fine for 1080p but I wanted 4GB for video editing.
I know you do photography and if you use Photoshop or the Adobe suite then I would probably recommend you get the GTX 760 over the 280X so that you can take advantage of CUDA GPU acceleration which generally works better in the Adobe suite than OpenGL which you'll get with a Radeon does (I've had recent experience with both having come from a 5870 to a 760).
If you are using Photoshop CS6 or older then you'll want the GTX 760 because I believe it was in Photoshop CC that they introduced support for GPU acceleration with OpenGL cards (ie, AMD graphics cards). Before that it was CUDA only meaning that GPU acceleration only worked with NVIDIA cards.
But if you're not fussed about that, then the Radeon is slightly quicker in games than the GeForce but both perform very well indeed, so I think you will be content with either. :good:
Your existing power supply is fine for either card by the way.