I have the 3pj its a great system. Lots of key elements. A bit tricky to navigate but pretty routine once you figure it out.
Im looking to upgrade to the 3pk soon. So I know what you mean on finding them for cheap, its pretty hard to find them for the range your looking at.
I also see a lot of these at the track and with the dsm's on them. I like the smaller size of them as well.