It was nice that you used real music for your review, thank you for that. I was a very helpful review.
A common complaint I see is that the XBA's lack or have no bass. If the bass is natural; not forced, bloated, or tubby, then I am in. Have going to a lot of concerts and recording a lot of them; to me I have a fairly decent reference point. To me detail trumps bass, especially when listening to non-amplified instruments.
Yes I too use Altoid tins. Since I have been using them (6 years). I haven't had a pair of headphones go bad. I use to have to replace headphones every year but, since using Altoid tins no problem.