Originally posted by RonHendriks1966 Always a difficult question. The current kitlenses in WR are costing 318 euro bought separate and 270 euro extra for the double kit extra to a body only. You only pay 70 euro extra for a 18-55mm lenskitpack to a body only.
So making the budget bigger gives a lot off room for improved quality in lensdesign. Ofcourse, metal mount and a lenshood and pouch, since this is not the plastic fantastic world.
I think part of the issue regarding the K-5 and high-quality kit lenses is that even though the K-5 is Pentax's flagship DSLR, it's not a
real flagship in the sense that it could compete with, say, a Nikon D3x. At $1300 USD it's affordable enough for many people who know absolutely nothing about photography, but simply want a "top of the line" kind of camera. But once the price is bumped close to $2000, it will lose the demographic at which kit lenses are generally aimed. Hence my idea about offering to separate kit lens packages, one with DA 35 f/2.4 & the other with the 18-135WR.
I think (again) that people who do know Pentax, in a modern sense, look at Pentax as the brand with affordable weather-sealing and/or the brand with the neat primes. IMO that should be exploited.
Given all that, based on your list, I would say the kit lens should be either the
DA 17-70mm/f4 WR or
DA 20-100mm/f3.2-5.0 WR. The DA 25-100mm/f4.0 WR doesn't strike me as being wide enough, the Combo DA 16-45mm/f4 WR and DA 45-125mm/f4 WR seems awkward, and I don't think Pentax could do DA 18-55mm/f2.8-4.0 WR for 150.