go to www.caraudioforum.com and search "big 3" upgrade. This is a simple upgrade that eliminates the need for a cap.
i have heard the same things, even cases where these caps blow up. i have about 1350 watts and ive never had any problems with it except for headlight dim which is no biggie.yea caps, are usually overrated and not needed, im running 1500watts atm, and it will barely dim the lights if any on the big hits