I fried one of my midbass speakers, which are pretty old now, and was looking at getting a new set. They will be in in the doors of my mustang and play a frequency range from 80hz to around 250hz (Maybe up to 500hz). The one's I had (still have one of are the Crossfire MB6, so around 6" to 6.5" is what I'm looking for. What speaker is a good bang for the buck for this purpose. Thanks.