Okay...so here's what I plan to do. I am stepping away from the turbo upgrade on a stock EJ20. Instead, I will build from the ground up. In order for me to enjoy the power upgrade from a turbo, first I am going to purchase and install some RA gear sets and while in the trans, replace the factory clutch with an ACT stage 2 clutch kit and exedy flywheel @ 12-14 lbs and a B&M sort shifter. I plan to either go with a PE1818, VF22, sr30, sbr gt-10, AVO 400, or 18G turbo upgrade. Either way...I talked to a guy at a shop today and says that these upgrades won't hurt the stock motor but will work out better in the long run for just about any upgrade up to 350WHP. I just wanted to know what you guys and gals think of this. I will stop by the shop tomorrow to order the parts. Let me know...all opinions welcome.
APS is known for their quality. Lets just say you get what you pay for! THe SR30 is an extremely reliable turbo that produces the same power as all those turbos you listed! But whatever you choose you will enjoy! Good luck