I have been doing tons of searching here and on other forums as I try to figure out exactly what I want to go into my next build. My question here is on subs. I have it narrowed down to three choices(til someone decides to throw something else into the mix). Diamond Audio D6, Fi Q, and SSA ICON. I will be using 2 15" drivers in an ex cab ranger. Most likely sealed at about 5 cubes. They will be seeing 1800rms from a T1500-1BD. I like it loud and clear. Tight and accurate all the way down to 40hz and lower. I like flat response, not too crazy peaky(except some hip-hop). I listen to anything, mostly rock though. I am looking to see if anyone can compare the Diamonds to the others. I talked to Mark and John here in AZ and they said the ICON and Q are very similar. I also read on here somewhere that in sealed the Q has an advantage. Just looking for some more opinions. Any help is great. Thanks in advance.