The last year or so, I've used the 24-120mm f/4 as a walk-around lens, and while it's mostly sharp enough, CA is terrible to a degree that is difficult to live with. Sometimes, I haven't been able to remove it in ACR without performing all kinds of tricks not to de-saturate colours that are supposed to remain in the photo. While I expect the problem to be easier to live with on the D700, I'm looking for other options.
One is the "old" 28-70mm f/2.8. This is a lens that seems to have few weaknesses and with CA under control. There are many of them in good condition for sale at $6-700, so the investment is modest. Any experiences?