New to the club and to the modding scene. Subaru Impreza WRX '07, never modded/tuned. After reading for a few hours it seems that stage 1 tuning is a no-brainer. Question is, should I buy Cobb AP and do it myself (and re-tune as I get to stage 2) or do I go to a professional tuner with Dyno equipment (I happened to have one really close). Does professional tuning do anything other than loading a profile from Cobb AP?