piggyback recomendations

[blake]

i am interested in getting a sytem to run piggie back to my ecu or replace it, my veical i have is a 91 toyota supra with a motor swap from an 88 turbo supra incuding the ecu 5speed trans and motor, i have increased the pistions to 60 oversided forged wiseco pistions, an after market t67 turbo, eagle connecting rods h-beam, 28 thousants shaved from the block and head total, a 2mm thick meatal head gasket, t4 manafold w/ a 50mm waste gate, a generic blowoff valve a 3inch exsoust 18x12x3 intercooler, lexus afm, 550cc injector's, 255lph fuel pump, and alot more part's. im looking for 450-500 hp do you have any recomendations to what would run best, one more thing im not looking to spend 400+ us on a piggie back system but if it come's down to it im flexable...