SDi Saloon speakers

Hi,

Been looking at various threads re: Rear Speakers but all seem to be for hatches.

Any advice on the saloon i.e. what size fit 13's or 10's cm in the factory location in the rear shelf?

Also because its a base model will the wiring be there when I take the trim off to fit them or is it a case of having to feed through to the head unit.

Also is the rear shelf solid or is it possible to add a pair of 16.5 cm's on there?

Front speakers seem OK but need more sound and better balance.

Do subs work OK on the saloon?

Am I the first to actually bother with a saloon?