I'm going to go with the L7 over the 2 L5s as well. As for the HDC3 vs. the L7 that would pretty much be a toss up. Essentially, that would come down to box. I do think the L7 would like the mid 20s better than the HDC which would probably be louder in the 40s.its going in a nissan maxima. do u think the aq hdc3 15 would be louder than the L7 15?