Beating a Dead Horse. SUBS

Vandersteen, Rel or whatever. Has anyone actually ever a/b the 2 subs side by side. Not talking the vandy 2w which has a 12in passive. I'm talking about the vandy 2wq which only has 3 8inch subs and also the rel storm III with the 10in.. I don't care about ht sound, just music. Must be quick/fast, accurate, detailed, not muddy or still vibrating after the fact. I do have Martin speakers and would be adding 2 subs for music. I've listened to the rel storm III @ tweeter and it sucked, but I know for a fact they did not have it hooked up correctly. Though the salesman mentioned all the great features, he had no idea how to use them; neither did I. I'm sure set up properly it would be great. But I have to think 3-8in subs must be quicker than a 10in sub, but I could be wrong. If you have auditioned these side by side I would like to know what the differences are(also did you notice if they were hooked up correctly and broken in). This thread came after reading the recent thread on vandy verses rel.. I noticed one agoner upgrade from the 2w to the 2wq and after reading extensively on the vandy subs, I can see why; he wanted music over ht. Another agoner had both the rel storm III and the q201, he stated he used the storm III for ht and the q201 for music. Why would you not use the III for music???, as it is suppose to be better than the q201. Another agoner mentioned the bag end sub as beating the both the rel and vandy in music, I don't know much about bag but isn't that an 18in sub and how could a 18 be more musical than a 10 or 8in sub. Excuse my ignorance but I do not know much about subs and everything I thought I learned about them is the smaller the sub, the more musical it would be. Sorry to continue the thread on subs, but no one ever mentions if they auditioned the 2 side/side, they just say that the rel, aerial, vandy, etc.... is the best they ever heard. Looking for help here..
Thanx Pete