Looking to buy 2 18" bl's

[squidder 0]

Im thinking about buying two 18" bl's to replace my two 12" l7s (sound like shit). I have a brand new 2011 avalanche i would be putting these in. Id be using the trunk and i dont care if i took up every bit of that trunk. I should have plenty of room in there to put the recommended enclosure in yes? or would i have to get 2 15"? Also I know the bl's will shit on them as far as sq is concerned, but would the bls be that much louder? Ill be using these for daily driving, not competition. With 99% of the music being played will be rap.

Thanks for the input guys

Edited April 18, 2011 by squidder