yes but you made 264whp and you state you are going to make 350whp w/ stage III+ on 100oct... that is 100whp difference... i don't think there is that big of difference in the kits to make 100whp as you stated - IMO
stage III+ has the price tag of 5k which doesn't include bolt on's, i for one can make 300whp on less $$$ and will soon enough.
i'm not knocking your shit just the numbers you are stating... you already stated APR states numbers by the flywheel and apr rates their III+ at 340hp to the crank on 93oct, so if you retain the same loss of power you had with the stage III you would be around 305-315whp. Where are you going to be making up 100whp on the III+?
if you make that much power more power to ya, i just think you can make similar power for cheaper or if you really want to spend that much do a custom turbo setup and go big like 400+whp range.