RevHard Turbo Manifold GOOD
T3/T4 Turbo GOOD, but for just 6 psi a junkyard turbo will do it for $500 cheaper
Tial Wastegate GOOD, better than the Deltagate but more $$$
K&N Cone Filter GOOD, don't pay extra for some HKS filter or something
HKS SS BOV GOOD, but you can save $200 by going with a
Eclipse BOV, which sounds pretty cool too
Inline Pro HeadGasket WHY? Unless your current HG is going already
Zdyne Gold SECU GOOD, maybe overkill for just 6 psi
??? Intercooler (dont know what to get...) Get anything you can find. Check old Ford Probes, Chrysler New Yorkers and Lebarons, DSMS, Volvos, and Saabs.
Zdyne 450cc injectors (come w/ Zdyne BoostTight seal set) Save some cash by going with DSM 450 cc injectors from a junkyard. I dont think you'll need 450s with 6 psi anyway, stock will pobably be fine.
Holley 255LPH Fuel Pump GOOD, but again, I don't think you'll need it at this level of boost
AEM FuelRail w/ FPR SEE ABOVE
MSD 6AL
MSD Blaster 3 Coil
MSD Pro Cap I dont think you'll need all this "increased ignition power" for this boost level
Basically, you asking for way too much for that budget, especially with only six pounds of boost. Definently check out homemadeturbo.com, and check out Abaz's setups. He ran 14 psi with the stock feul pump and mitsu injectors, junkyard turbo, junkyard intercooler and piping, and did it for hella cheap.