There are going to be four main players as far as you are concerned.
1. Ford Galaxy - Sister car to the SMAX, but bigger and visually more MPV like.
2. Chrysler Voyager - Big full sized US MPV.
3. Renault Espace / Grand Espace - As you've already found out, good all rounder.
4. Kia Sedona - Budget MPV, not a great drive but spacious.
Another left field choice if something more van based and "Full Sized" lights your candle, would be a VW Caravelle?!?!
The only way is to go and play, then you will find what ticks the right boxes for you.
Best of luck.
Read my motoring and car related diatribe at.........
http://TegTypeR.blog.co.uk
Updated: 30th November 2008