What do you think of the 14-24? I've only ever read about them.
It's an excellent lens. However it's use is not "to get everything in the frame."
I love it, but unfortunately I don't think it's for everybody. A better choice in my opinion would be the 17-35mm f/2.8
Recently I picked up 28-300mm f/3.5-5.6; it's got a bit of distortion, but overall it's a great carry around lens; it is however big, but uses the standard 77mm filter size. Range is excellent and 28mm offers a pretty good view.
My current favorite prime is the 35mm f/1.4superb. Fast; the main reason I picked it over the 24mm is it's a good balance where it's not too wide like the 24 and not too close like the 50. I sold my 50mm not sure why, my next prime would be 85mm f/1.4
For a zoom, I have the 70-200mm f/2.8; with a 1.7x teleconverter, offers great zoom while still fast enough for AF to work correctly.