my current build/set-up consists of;

Head:
P08 D15b vtec head PnP'd by turbo dynamic
3 angle valve job (valves and head)
New OE valve seals
OE valves
Skunk2 Valves spring and retainers
Skunk2 Camshaft
Skunk2 Adjustable Cam Gear
Ported and Port matched d15b intake manifold

Block:
SOHC ZC block with a KMS block gaurd
Arp head studs
Cometic headgasket
Vitara Pistons
Tuner toy rods with ARP2000 rod bolts
ACL Race Bearings (main, rods, thrust washers)
4.5lb lightened Fidanza Flywheel
Clutchmaster Stage 3 clutch

Turbo:
Pipping; 2in on the hot side of the IC and 2.5in on the cold side
Massive FMIC 32x16x2.5
450cc injectors
Old nopi BIg tube tubular Manifold
HKS style Wastegate
IHI warner ishi Turbo i think its a .48/.52 but im not sure
Greddy type RS BOV

Im not sure if im forgetting anything.
What i was wanting to know is how much boost can i push i shooting for 15-20lbs or whatever will get me close to 300whp. does anyone know what to expect out of a d-series on 15lbs.