[Giller]

Hey all...curious if anyone has experience/knowledge of Focal speakers. Have a 987 Boxster with the base sound system so need an upgrade. Wondering about swapping out factory stuff with Focal 100's in the dash and 165's in the doors. Thoughts? Will that make much of a difference, or do I really need to get the rear speakers and maybe an amp/sub?
Not looking for loud - looking for a nice, clean sound.
Thanks!