wassup from hawaii! tho i got some Q's

[shaggadelic]

Hello everyone. my father-in-law and i have a 89 240 with a sr20det black top in it. our turbo just went and we need to upgrade. i was thinking of going with thge s15 turbo. i was wanting to know the pros and cons of this turbo. and also what supporting mods i will need to support this turbo. i was also thinking of going with a e-manage ultimate(i have this for my suby tho not installed yet)

Also what does the stock s15 boost at and what is a safe boost for the sr20det blacktop to boost at.

mods:
megan dp
megan exhuast
o2 housing
greddy fmic
bov
mini battery
walbaro fuel pump
grounding wires
nismo rear diff
exedy clutch

my car is a 2001 subaru impreza rs-t
Engine:
Ludespeed Stage 2 turbo kit
E-manage ultimate EMS
T3/T4 turbo
Tial wastegate
Apex ITC (thinking of removing)
HKS SSQS BOV
Cartech RRPPR (thinking of removing)
Walbro 255 fuel pump
V6 STI RA gear set for the n/a tranny cyro treated
Hyper voltage meter and grounding kit type -mr
NGK spark plugs
Spearco intercooler
2-inch up-pipe
2 1/2 inch down-pipe
Cusco oil catch can
Blitz nur spec touring exhaust full system
Exedy stage 1 clutch
Fidanza 11lbs flywheel
Borla headers with thermal wrapping