My friend owns an rx4 with a series 5. Engine mods include: microtech mt4, intake/exhaust ported, 2 series 5 IC front mounted, recently rebuilt (3mm), IC water spray, and probably some other stuff. He recently took his to4 off (and sold it to me ) in search of a larger turbo. He had one set-up for a while, but the deal fell through. He ran 12.6 with the to4 and was looking at mid 10s with the new turbo set up. What turbo for the given situation would suit him? He’s been offered a t45 ~$2500, larger to4, and Dyson has t-66 for 1950 2nd hand. He has no hesitation hitting 8000rpm. What would you guys recommend???