Replacing interior doors

I'm thinking about replacing some of the interior doors. Ours are so crappy. They're basically hollow shells thrown up on a hole in the wall. Even the hinges and knobs look like something out of a horror movie. My favorite is slamming the door TWICE every morning because it won't latch the first time. That's after it swings close like a squeaky gate. Frank Door and Lumber in Shoreline is an excellent door company, but kind of expensive. So I browsed their scrap doors. Found a good one, but not really the look I was thinking.
I went to a salvage store in Ballard today and found they organize their doors by number of panels (one panel-BINGO, on up to six!). They also have the measurements written on the side. I figure it'll be a slow project....maybe a door per month until all seven are replaced. It's some minor sanding, planing, and painting. Knobs are another story.