Damn, i cant think what size they are.... but im sure someone will have the answer for you in no time atall.
But ive got Focal PolyKelvars in mine, i cant fault them atall and really like the way they sound, but theyre aroud £300 for the front components.
Just had a system put in my vectra aswell and gone again for the Focal PolyKevlar range of speakers.
Dont know if theyre be any good for you but try
www.torquesystems.co.uk
Hope that helps
Kelvin