I'll throw out another vote for the PFC. I got mine used for $650 with a Commander. I picked up the Datalogit not too long after for $300ish shipped new. So, $950 for a completely stand alone ECU that can do anything you need it to do. Super easy to install, use, monitor, and tune. The Datalogit guys continually improve the software, so it gets even better with every new release. Just my $.02.