I'm wanting to turn the boost in my turbo'ed outback up from stock 8 psi to 10 or 11. What do you think?

Just for background, here's the mod list:
Mods:
EJ22T ECU & wiring harness
EJ22T crank & rods
EJ25 (NA) block halves.
EJ25 DOHC heads ('96 with hydro adjusters)
EJ25 flat top pistons
EJ20G intake manifold
440cc injectors
VF8 turbo (JDM ej20g)
catless 3" bellmouth downpipe
EJ22T exhaust
EJ22T fuel pump (have Walbro 255 in a box)
2002 WRX top mount IC with custom IC y-pipe
TurboXS adjustable bypass valve