I have never heard of the bully dog... I'm assuming by programmer you mean an ECU tune. UpRev is currently the most popular solution. ECUtek has yet to prove themselves on the 370z but seem to be very promising.
Do a search on the forums before making new threads. All of your questions have been asked and answered a dozen times in the last 4 years.
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35% Hooper Optik | Takeda Attack CAI | F.I. HFC | Hotchkis Sway Bar | Stillen 24row | OS Giken Super Lock LSD | TK Shift Knob | EVO-R Carbon Diffuser
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