The original list:
VW Passat Estate (best of the bunch so far)
VW Touran (seemed a bit basic)
Citroen C4 Grand Picasso (great gadgets worried about reliability)
Peugeot Estates ??
Can't comment on the VWs (Don't like 'em, never will, haven't driven them for that reason) but he C4 is getting long in the tooth now, although it does everything well. I drive a Citoen C6 and it has more gadgets than the Enterprise, and has been very reliable, apart from the infernal tyre pressure sensors. But I digress.
When the C6 was in for a minor body repair, I was given a brand new Peugeot 508 estate which I liked a lot. A typical estate car that does all you would expect. Big and comfortable, drives like a regular car.
I'm surprised that nobody has suggested the Ford S-Max which, IMO, is the best-driving MPV you can buy. Looks good too.