what type of td06 are you using? (td06-20g or td06-25g and what size rear housing 8,10 or 12cm?)
I would go with the following mods:
ECU (Apexi PFC - you should be able to find a second hand one very easy, as they no longer make them)
Fuel Pump (tomie,nismo etc etc, they are all bolton and will supply you with enough fuel)
Injectors (NISMO 550cc or 740cc; because you have an rb25 get nismo as they are direct bolton, unlike sard injectors)
AFM (z23 afm + z23 afm plug)
go get a tune and depending what type of td06 you have you should be in the 300rwhp range.
Reliable depends on your tune, im running 337rwhp @ 16psi with 11:1 AFR (rich tune) (100,000km) my car see alot of limiter smashing and bashing, abuses from antilag and i do like to do abit of track work (drag,mc and drift when i can get time) AND i havn't had a problem yet
(my engine is unopen stock rb25det)
good luck
oh and if you need some help finding a second hand pfc, i can source you one
-Michael