I would be happy with f4/ or even variable aperture sharp zoom like the canon 24-105 and the 70-200. I could probably carry both those for about the same weight my 80-200 is now.So what do you want then ?
It looks like a few people would be happy with a few constant F4 zooms .What lenses do I want from Nikon? well, I'll take any that they want to give to me. But in reality, I just started discovering primes, and how much I love them, although I'll never trade out my 70-300VR, I voted for fast 135 as the one I have is one of my favorite lenses. Making the 70-300VR a constant aperture would be nice (even if only F4) as long as it didn't skyrocket the price.