Looking for a system upgrade and, in particular, for a sub that makes the earth and sofa move. There's a lot of good words (and a few bad) on here about SVS but if it needs to be imported direct is there nowhere it can be auditioned? Any suggestions on the model(s) that make your internals vibrate? How is it with music, although that's a secondary issue? In terms of the amp I was hoping to get the Denon 3803 although may need to go for the 1804 in the shorter term. Will this make a significant difference to the sub performance? What about speaker matching? I quite like the Gallo micros (although the sub didn't do much for me which is why I'm looking for a separate). Is it feasible to put an SVS with the Gallos? Does the absence of crossover on the speakers cause any difficulties? Sorry, there's a lot of questions. Any help gratefully received.