Yup that or the PC680 if your looking for more weight savings. I dont kno whow power hungry our cars are on start up. If I was buying and had any concerns about battery life I woul dgo with the larger unit for that added level of comfort.
I have been tempted to add the pc680 for winter time but my car did well with the Hatch mounted system this year even with only 4 gauge run front to back