Just for reference.
A friend has a R32 GTR with GT2530s, bigger injectors, E85 fuel and Haltech ECU. Everything else is stock including the cooler.
Made 365awkw all day long. Now that summer has arrived he replaced the cooler with a stock R34 GTR cooler and with just the swap an 1psi more boost makes 385awkw.
Nothing wrong with stock GTR coolers.
I would just get the one that's within your budget.