[ChiTownCity]

^It really is all about the quality of your lenses. As long as you have a high end DX model and a couple of quality lenses then there really isn't much of any reason to go full frame. Unless you're planning on printing billboards, Lol.

Like you pointed out already, you're really just paying for extra ISO for the most part.

I look through thousands of pics each week on Flickr and so far the only noticeable difference I've seen between DX and FX came from the Canon 5D Mark II and III.

Aside from the extra ISO, you'll definitely notice the difference in depth-of-field in some cases. I wish I bookmarked a couple of pics (I'll see if I can find them later), but I personally don't see that small upgrade being worth a few extra thousand dollars.....