My feeling now is that I'll keep the big zoom, really don't use the wider end of the 18-55 enough to justify keeping it, and will probably replace the 18-55 and the 35mm with a good 50mm lens, it's more the sort of focal length I like to work with, and my experiments with the Yonguo lens on the Canon showed that I was getting some reasonable results. Needless to say the Nikon-fit 50mm lenses are hugely more expensive than the Canon-fit Yonguo. There is no urgency about any of this, of course, so the master plan is to get a good 50mm first (or possibly a 60mm Micro-Nikkor if one comes my way) and worry about the rest of it later.
Also posted at http://ffutures.dreamwidth.org/2094256.html, where there are comments. Please comment here or there using OpenID.