This sounds good - I'd agree the K-7 would be a 'modest' budget landscape option. Definitely a good hiking etc choice. Otherwise really the big advantages come in the larger sensor categories which is seriously big bucks compared to the APS-C's. Maybe the 645D will make it into the high-end landscape sphere, weather-sealed too.
Originally posted by jct us101: I would consider the K-7 to be pretty close to a pro camera body, I mean it has everything that the other brands pro cameras have just for a lot less money. I don't see why that doesn't qualify it to be a pro camera though, it sure seems like one.
'Pro' is definitely a somewhat slippery category, useful for not much else than very generally clarifying a cameras features in relation to other cameras. K-7 is great, and I'm sure it is used by a lot of professional photographers. It's also interesting that lots of pros, especially those buying their own gear, don't use the highest-end camera bodies because they're just too expensive to justify the advantages over other cameras. For example, the 50D was a very popular photojournalism choice, for good quality images and fast AF etc.
K-7 is, in the scheme of things, mid-range. Unless you think in terms of APS-C in which case it's up with the 7D and D300S flagships. But if people have the money it's really not up with the top 35mm DSLRs, in terms of performance and specs. Some of them have much higher frame rates, much higher ISO capabilities, super AF with heaps of points, AF tracking, bigger viewfinders, etc (of course they're not only expensive but big). Compare the K-7 and D3S for instance.