So I finally got another digital camera. It's a Canon 1D, and I ordered a 28-105 lens for it but that didn't get here yet. Shot a little with my Pentax 55mm, which is super sharp at f/11 (which I shot this photo at, using an extension tube. The second one is a 100% crop).

I like the camera so far, it's pretty huge and heavy, but other than that it seems to be what I was looking for. I still want a K10D for a backup/portrait camera, but that'll have to wait until I can get a zoom tele for this.