Neil, yes, Focal and JL are about as good as it gets, Rudy, offer Dem some money for his Becker GP, its still sitting in his boot by the sound of it. Its more powerful, fits the OEM style and has bluetooth phone kit built in with separate mic.
The issue you will still have are the cavities. Some cars just seem to struggle to get any descent sound out of them, same as an Alfa GTV. The enclosures just arnt stiff enough or have holes and gaps and just don't lend themselves to sound, with the bass seeping away.