I'm doing the same upgrade, Focal speakers, keeping the standard bass speakers under the seats for now but might be upgrading them for the Earthquake Sw-8 woofers. I'm using Jbl Ms-8 with JL XD 400/4 and 600/1 amp. The sub I'm going to be using is a Jl audio 12W3. Not sure what's it's going to sound like but I'll keep you guys up to date when I pick up the car.