We have opted for 150 Lt fridge too, but I don't think I will be able to talk the hubby into getting the aircon put on the roof.....hmmmm need to powerball on thursday night!
Does it stow away in the van somewhere, or do you have to carry it in the back of the car?
You have probably made your decision by now, but I have purchased a convection oven similar to this one (http://www.ebay.com.au/itm/Convecti.../230739826868?pt=AU_Ovens&hash=item35b92a58b4) which I got from Harris Scarfe for $40 - fits perfectly under my sink!
Could you replace the microwave with a convection microwave ?