Hey I'm gettin ready to replace the factory speakers and wanted to get some input. What do you guys think are the best brands to install in the Impala, I'm gonna put the 6.5" in the door. I was thinking about brands like Alumapro, Marathon, Cadence, Memphis. So what else is out there that would be better? I'm also looking at later on maybe toward a some what competition system so any input would help.