Tim, the 45mm AF (pre-D) can vary from copy to copy. Reports suggest that the 55mm AF is more consistently better than the 45 AF, and that reflects the results from my kit too (I have both, and have not shot the new 45).
Stopped down, my 45 AF is OK. I have gotten some great results from it, but wide open it does get a little mushy (mostly in the lower-left corner). For most landscape it has not really been an issue though. I don't recall where you're located Tim, but you'd be welcome to shoot mine sometime.
And I like my 150mm f/3.5, but I would rather have the new f/2.8 because of it's stellar performance. I have never been disappointed with the 150 AF f/3.5 though. I have used it for landscape to great success, and used it together with the 210 ULD for an outdoor portrait session where it would have been fun to have the new 150 D, but the humble f/3.5 AF performed fantastically. I don't think it's really fair to compare the last two versions of the 150, as the new "D" is so special, but I do feel that the 150 3.5 AF is a good performer for the money. There may be copy variation (I don't know), and if so, I got lucky the first time around on mine.