I'm running a 9 RS turbo (TD05HRA-16G6mC-10.5T = 1515A059). I live near STL, MO- a lot of twisty, hilling roads around here. The turbo response is AWESOME. I bought this turbo w/the mindset I was only going to be burning 93 octane and keep the boost level at or below stock setting of 21 psi. I bought the turbo from an importer of genuine JDM Mitsu parts, so the cost was well over $2k. I'm picky and a perfectionist too.

 

these turbo's are notorious for exploding the compressor wheel with increased turbine speed and boost. (orangy compressor?)
Hope you dont have that same problem!