Originally posted by clackers For me, the 28-105 is such a good piece of glass it'd be plausible to have it on my K-S2 or K-30, but only if I was also bringing the DA15. It's such a small lens, that's plausible.
It also works when paired with the DA 21.
However, the 18-135 is an excellent lens with which to start - it is unlikely that you will be disappointed. Over a period of months or a year, you can make use of its wide range to find out which are your preferred focal lengths, and then make an informed personal decision about your next lens purchase.
Philip