Watch out for dynamic width.... I have seen a LOT of sites that use dynamic width and their images and content looks messy and faulty on high res monitors 1920X1200 for instance.
For text only dynamic width is cool, but as soon as you insert images and flash applications things start to fly around and look kinda odd...
Personal blog will default to fixed, which I have reset to about 900px wide. I'll probably open it a bit more. There's now a left sidebar, which will stay mostly whitespace. This blog is almost all text.
On the other site, I'll go with fixed wide.
No perfect answer, is there? As you said, "Oh, well."