I am a novice and am looking for some suggestions.  I have heard a lot good things about Sundown subs, looking at the website I am similarly impressed.  I have a Toyota Tacoma Double cab and am looking to put a modest sq system in it.  I have jvc double din and alpine s series component and coaxials in place.  I have been trying to research a sq sub for the low end.  I was going to use a single 10 in a Tacotunes enclosure ( 0.55 cu sealed with a 5.5 in top mount depth enclosure).  And powering with a 5 channel amp, either re audio or alpine. I have been looking at the e series and the sd-2 series.   Which sundown sub would be the best choice for a sq sub?  I appreciate any suggestions?