They have good weight and track well. I picked up the PRB PS-2 and a PRB 40-foot Airslide from a friend back east. They've been showing up on eBay fairly frequently and the prices have run from $125 to $350 depending on the car. Atlas seems to get the closest to brass with respect to detail and it would be nice to see them run these cars.
Interestingly enough, the Trainman 3-bay PS2's were surprisingly well done. They're also a nice size so they'll be at home on a smaller layout as well as a large one.
