i think i'm gonna take out the rears for show.  if i do compete, it'll be on a local level, nothing professional.  I mainly want it for show, but i don't wanna be a low finishin' guy in comps.  ok (writes down 4 subs), so a 4 sub setup should get me bumpin'.  any advice on how to power them and on other speakers/tweeters?  Also, does it matter where i mount the subs?  Will the sound quality differ depending on where i mount them?  thanks.  u can email me at 
evobikes@hotmail.com