Putting new rear speakers help!

[BlkBimmer562]

i want to put new rear speakers should i get two new 4" speaker for the rear or should i get the 6X9 conversion? if i get the 6X9 conversion were do i get the adapters?

[1995E36]

The link below has the adapters you need.

http://www.bavariansoundwerks.com/index.php

Also you should post this in the car audio & electronics section, not the classifieds.