I currently have a Nikon D7100 DX SLR, but I'm not sure how much that factors into my question.
I've been coveting the Nikon 14-24mm F/2.8 FX lens, even though I have a DX camera. I am waiting for Nikon to announce their new lineup on their 100th anniversary on July 25th, to determine if I want to upgrade to FX, get a new DX if it's good enough, or stay with my current camera. There are DX lenses with that focal length, but they don't open to 2.8, and the Nikon 14-24mm F2.8 is a phenomenal lens from what I've read. I want a fast lens so I can shoot some star trails, although that would not be its primary purpose. I want a phenomenal landscape lens for photographing meadows, mountains, and an occasional urbanscape. I also want an ultra-wide because there are plenty of times when I can not get further from the subject without introducing unwanted hordes of people into the picture.
I read that I should learn to use a tilt-shift lens if I want to take photos as good as Ansel Adams with his View camera. I don't need a tilt-shift lens for architecture photography, but I could see how the straight lines would come in handy for forest landscapes. The pictures taken from tilt-shift lenses look amazing, for their ability to have a large rock in the immediate foreground, a mountain in the far background, and a lake in the middle; and for it all to be focused and sharp as a tack. I can see how a tilt-shift lens would be so much fun to use, and I would also be interested in learning how to shoot portraits where I blur everything but the subject's faces, and potentially food photography. However, I've also read many of the benefits of a tilt-shift lens can be replicated in Photoshop.
That's the background, so here's the question: Is the Nikon 14-24mm F/2.8 FX lens as sharp as a Tilt-Shift lens when I want everything in focus? Can the Nikon take a picture like the mountain picture I have attached, or do pictures like these absolutely require a tilt-shift lens? I can't really afford either lens, but if I'm going to be stupid, I need to pick one or the other. Which lens will take my photos the furthest?