Double wishbone is the only way to go. Most double wishbone set ups are much easier to tune for camber and toe in. Another advantage I see is that you can employ unequal length and or non parallel arms to produce better suspension geometry. Also the peace of mind that if I pop an axle It won't do as much dammage.
The rear end in my car is made by BTR engineering. They supply the rear ends for both the Ford Falcon and the Holden (GM) Commodore. It uses a Borg Warner center and is a tough unit. You can buy a complete brand new rear end from Ford for about $6000 Aussie ($US3200).
Cheers