Post some pics of the install please //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
And print out the MSRP of IDQs, and tell him you want a sub thats comparable a pair of W3 10s or something wouldn't be that bad.
JL isn't a bad brand at all, really nice build quality and Manville is a decent guy.
I'd be willing to bet if you went in there with a few print outs of websites asking a couple of hundred bucks for an IDQ they'll either give you money to order another sub or he'll give you something of equal value of both subs.
I understand him not wanting to give you a pair of subs because they messed up one woofer....i wouldn't either.
If the sub is barely hitting the side panel its not going to cause it to fail also, it might sound like ass but you would be able to tell it was hitting it way before it messed up.
Whats wrong with the sub? If it burnt a coil I'd be willing to say it wasn't because it was hitting the side panel