My engine temps did not change from running the stock tiny intercooler to running an HDi kit.
Scotty's cooling mod, and a larger capacity radiator will improve the cooling system's ability to shed heat.
IMO; the OEM (quite noisy I agree) is far superior to thermo fans for heat management.
I've run a number of different setups using high capacity fans, and custom made shrouds to ensure efficiency, and nothing works better than the stock Clutch fan.
I did notice an improvement in cooling system performance when I changed from the stock "smiley face" front bar to the Aero Kit front bar.