Powerlogger does have a selection for Zeitronics non-linear. Too bad their computer interface is serial though, makes it tough to run on modern computers.
If you want a simple set up get the AEM. You can get them for $200 or less with a gauge. The gauge itself is the brain box too. So no extra boxes to hide like the PLX and LC-1. I have the PLX and like it. But I helped a buddy install the AEM and would get that one if I had to to it over again.