Originally posted by flydelsolsi I am currently working with a k2000 with plans to upgrade to a k20 in the very near future; I just want to invest in some glass first.
Wise move. There are operational advantages to the K20D and some features that might be useful, but any of the other bodies will take shots as good... with the right lenses.
Originally posted by flydelsolsi I am looking mainly for a decent grouping that can decently handle portraits, minimal macro work, and scenery shots.
Despite these different requirements you have chosen lenses that only cover from 35 to 50mm, which is not a very wide range. I also note that you have selected only autofocus Pentax lenses. Would you consider other brands or manual focus lenses? This opens up a whole other range of possibilities, some of which might be less expensive.
The DA35 is an excellent lens and good for flower macros and the like. However if you prefer insects or anything that might react to your presence, you might want a longer focal length so you have more working room. In any case, it might double as a landscape lens but there are reasons I don't like it for that. First, it is impossible to manual focus from 2 feet to infinity -- it's a tiny shift of the focus ring. Second, it is not wide enough for my preference.
For landscapes I prefer a manual focus 28mm and have had good luck with the Vivitar lenses, as an
extensive thread here illustrates. More often, however, I use the DA16-45mm, which is a truly excellent lens and a bargain. I note you do not include any zooms, but consider this as an upgrade to the kit lens.
Back to macro again, you may want to get the FA100/2.8 instead of the DA35. This will give you the working distance and a distinctly different focal length, useful also for portraits where you want to grab only the face. I have never used this lens because I have the Vivitar Series 1 105/2.5. But it's manual focus and you have to find it used.
If you are not that much into macro then skip a dedicated lens for now (use a reversed lens, extender or other technique) and instead get the FA77/1.8 as a great portrait lens.
This would leave either the FA 43/1.9 or the FA 50/1.4 as your "normal", also useful for full-length portraits. The former is more expensive and slower, but has a magical rendering quality I love.
All in all, as a Pentax auto-focus solution I would recommend:
DA 16-45/4 $240
FA 43/1.9 $370
FA 77/1.8 $510
Prices are taken from this forum's marketplace. Total is $120 over your budget, but you would be making no compromises with this glass.