I suggested it because it would do its job better, 10's generally handle lower notes with better authority, since this is a subwoofer, its job is to reproduce low notes. Therefore, I would go for the 10's. Just my 2centswhy does everybody think that the 10's would get louder? they have the same rms rating as the 8's, but the 8's are ported... i guess it just doesn't make much sense to me.