Big improvement, I think. The first was sharp, but noisy (NR would help that) and had a lens flare (I second the suggestion of a rubber lens hood). It felt busy too, I would have cropped out the light and a bit of the bottom, leaving just trees, as well as that bit of tree sticking out on the right.
Your last one is great, clean, longer trails, interesting foreground (what is that red "e" thing on the roof?). I've been trying to shoot star trails for a while and have had trouble finding a subject, getting the settings right, setting up the camera to do inverval shooting (I have the K-x too), and finding a clear sky at the right time without the moon.
I'm very curious how you took interval shots with the K-x - did you use PK Tether, or tape down the shutter?