I did a search and read everything there is here, and I just want to make sure I'm clear.

I have a base 05. There are no rear speakers.

From what I can tell, none of the other models have rear speakers, just rear subs. Is that correct?

I have seen speaker company references saying the XF has 6.5" rear speakers.

Has anyone put 6.5" speakers in the rear openings?
Would the base model have the wiring & openings already there?