I don't compete, yet I have friends that are in dB Drag. I am mostly a mixture between sound quality and LOUD.
As far as my system goes: Rockford Fosgate RFX 8320 HU Rockford Fosgate Power 800.4 (for the mids) Directed Viper 2500D (for the low end) Vifa XT.25 Tweets and DDW6.5 mids A pair of DD (Digital Designs) 9515's for the low end
That was the main reason I eventually quit - my job was five minutes down the road from my house and the battery kept going flat! All I need to do now is sell off the equipment. Finding it very hard to do as people don't seem to want to buy high-end stuff second hand.