Hi SLG and welcome to the forums. I'll have to admit I'm a bit jealous, my retirement is 3 years away. But I'm looking forward to it hugely. I've got a really long list of stuff to do. Anyways, I've a couple of questions. Do you have any of your old pentax K1000 lenses? They will work perfectly on your new K-7. Obviously, they won't auto focus and if they aren't "A" lenses you won't have auto aperture either, but if you used a K1000, they will work perfectly well.
I'm going to go a different route in my lens suggestions.
I'm going to suggest either the pentax DA 16-45 or the Tamron 17-50 and also a Raynox 125 or 250 clip on macro. The Raynox's are pretty inexpensive and give great results
see here This way you will be able to get decent macros and also have a good all'round shooting lens. As far as I'm concerned landscapes usually require something a bit on the wide side, at least below 20mm. And both of these lenses will give you that.
Since you don't mind manual focusing I'm also going to recommend the Pentax "A" 70-210 lens. It's a good medium telephoto, is relatively good in low light at constant F4.0 for a older telephoto zoom, and it has the best bokeh of any of my zooms. It even has a "macro" function at the 70mm end, tho I'd label it more "close focus" than true macro. They are relatively inexpensive. As far as I know there is at least one for sale in our local marketplace, do a search for "Pentax A 70-210"
NaCl( oh and welcome to LBA too!)H2O