Are you sure you want focal?...
I had MB Quart mid series (~$600), Running from a Precision 2*250w
Lower end splits in the rear.
Two rockford P1's subs running from a 300w amp..
All off a single din JVC with 3" screen and pumped out a clear 110db.

My own opinion, I wouldnt fork out the price for focal, even the dealer recommended not to get it..