I'd second the vote for a Bushman's - I've had mine for 2 years now and love it for the following reasons:
Low low current draw (2.5 days of straight running without charging on a 50ampHr battery, and versatility due to the changing lids which means the difference between being able to have the fridge in the car daily and the blind hiding it, then the big lids on when going away :)
Also met a guy the other day who spotted me loading mine in Coles that asked whether I liked it - I replied yes of course and he proceeded to tell me that his has been running for 6 years straight in the back of his Troopy!!!! :o

