you can replace the head unit with any single or double din one - you will need a pac roem-nis2 adapter if keeping standard bose speakers etc - this is all covered in the ICE section though
adding nissan steering controls to an import isnt so straight forward I think - cruise control would be tricky.. you could get the head unit controls working using some tricky aftermarket electronics
personally I wouldn't retrofit the nissan satnav, there are better systems available!