Thanks for the advice. Enough people have told me to listen to the setup in the store that I'm backing off the Helix stuff. It was too difficult to find a distributor in France or the US, let alone to get someone to let me listen to them. I was figuring a 10" sub would be sufficient and was leaning towards a self powered unit.

The door pods are difficult though. There's no place in the door or kick panels so I'm not sure what I'm going to wind up doing there.