Radiator replacement...

I'll agree with Dave, I've heard of a lot of Mishimoto rads leaking out of the box. Maybe that's solved now. But I'd rather have a Denso. 

Toyota doesn't make rads, though most of you know that. Denso and Harrison make them. My OEM rad in my 96 Corolla was a Harrison. Replaced it with an identical Denso unit. The plastic end tanks simply have a certain lifespan. But the metal part was still in flawless condition after 20 years. My MR2 seems to be on the original rad at this point, and even though it's a thin little guy, the cooling on this car is superb it seems. Track days and pushing the car to its limits never make the needle even budge (not that the needle represents an actual temp scale in any shape or form). 

If it's a high power build, then yeah there might be more to it. 

BTW Dev what was Dave's username on SC? 

I believe it was Griffen or Boosted. Also goes by DDPR.  

A lot of times these radiators and shiny intercoolers are marketing bling for the grill.