My DH has a Navara. We fit three seats across the back pretty easily; a standard S&S convertible in the middle, a Maxirider on one side and a Hi Liner on the other. The convertible was initially rear facing for DD2, but now faces forwards. DD is 9 and no longer requires a booster, so we have removed the Maxirider and moved DS into the Hi Liner, but we had three across the back for well over a year (DD is very small so I kept her in the booster until a few months ago!). The kids never complained about a lack of room.
We have been pretty happy with the Navara (it a diesel, that's about all I can tell you about the mechanics!). DH now has a work car as well, a Holden Colorado. We have only had two seats in it, don't know if it would fit three? DH reckons it drives OK, but I reckon it's pretty ugly!!
