thinking out loud/rambeling:
since you are after a specific rpm range sizing the turbo will be the biggest part of this equation
do you plan to use the stock turbo mounting location?
a ej207 ver 8+ twinscroll + pe1825 or alike might be an interesting combo (which could also be run w/o a hydra)
can get your hands on a 2010+ jdm 207 heads with the dual avcs
what is he weight penalty between 2.0 2.2 and 2.5?
is is worth 50ft lbs? how about 150ft lbs
is water injection legal for scca