Are you looking to do dual sensors? I thought that was the specialty of the LM2 over the LM1. Of course, I did not see the AEM on Summit web site.
Innovative has a stand alone LC1 that will work great with a gauge, or will feed into a powerlogger which is much more optimal than stand alone gauge due to the recording functions. But, they are not available at Summit, especially the powerlogger.
Mike