I paid $350 for mine like 2 years ago. I've had roughly thirty 20 minute sessions (fastest group) at HighPerformance Drivign schools, and my water temp never exceeds 190/195.
So why would anyone go with a nismo over a custom koyo? stealth. effective. easy install. effective. Less wieght on the front of the car. i dunno. I just ask my self "why"? everytime someone posts a Koyo/Howe post.
as you know, some people drop loads of cash on big ass turbos that no one will ever see or experience. So why complain over $50 more money?