Originally posted by gabro822 And if you should buy a lens which covers quite the same range, what would you buy?
For this range (except longest 20mm) I went with the Tamron 17-50/2.8,
and have been very satisfied with it.
It stands cropping from 50mm for a 70mm equivalent
("digital zoom" in marketing-speak).
Although it's not WR (nor is my K-x),
I've been able to use it in pouring rain,
either from under an umbrella or shelter,
or taking it out quickly for shooting
and then wiping off the drops.
Various optical shortcomings (relevant for my photography)
or SDM concerns or questions of size
were what kept me away from the Pentax zooms. YMMV.