OP's asking for a good bolt on turbo for his R32, by reading this thread there are whole lot of unrelated information that I'm confused.
The photo shopped result contain a mixed batch of E85 results, pump results, externally gated results, internally gated results, cam moded, plus results of a NA+T Rb25.
Filtering out all the unrelated. Take unopened Rb20det engine on pump fuel. I'm seeing hypergear's atr43ss has the best curve which made the most power on based boost level given. Turbo is direct bolt on that required little/none modifications, that will be the turbo I will be voting for.