Originally posted by Karina1 also wanting tack sharp images from new lenses
For wildlife if you want "tack sharp" the best bet would be the DA* 300, which is about as sharp as you can hope to get at that focal range.
For landscapes, there are more choices. I use the DA 10-17, the DA 12-24, and a bunch of older manual focus lens, mostly primes, for that sort of work. I don't think you would go wrong with any of the current fixed aperture DA zooms or primes (I suspect you'd get slightly better results with primes, as they involve less optical compromises).