im a little fuzzy on it, but i helped a mate buy one about 18 months back. stream gets a couple of options, the 1800 which is a B18 afaik, and the newer 2.0 which is a K20A i think.
i seem to recall the 2.0 being chain driven as well, if your mate is one of those people who thinks paying for a cambelt is the end of the world.
it would be my first pick if i was buying a family mover, my mate has loved it with two smaller kids and their hordes of friends etc.
small enough to be car like with parking etc, but with capacity for africa when its needed.
oh and they are actually semi nimble / nippy if you are in that mood.