Swerve, you're definitely right. You should also pick an ECU based on who's in your area and who can help you if you need it. Say you use a Motec but there's no one within 500 miles that can help...doesn't do you much good. Like I said, I use the PFC/Datalogit and I "probably" won't spend my own money to switch to the AEM (I'll go Motec for a few more $$$) but it'd be fun to mess with it a bit. I'm sure the AEM can control timing/fuel just fine so the Supra guy who blew his engine had other issues probably related to his tuning. Then again, if the AEM isn't registering timing correctly, that's another story. Almost all the fast Supra guys are running the AEM aren't they (not including the pro guys but Street Tire class stuff like Titan)?