My favourite V8 would have to be anything made by Ferrari....especially the F40 engine!
Apart from that one of my other faves is the upcoming Audi RS4 V8...4.2 litre with FSI putting out 310kw at 8250rpm with 430Nm of torque...BEAUTIFUL!
As for Holden V8s....nice engines really. There isn't the outright refinement of some of the euro or Jap V8s, but they do what they are built to do, and do it well! Drove a mates R8 clubsport recently and it kept me smiling