I've got mild tinnitus too, but it's mild enough that I only notice it when it's very quiet, like when I lay down at night to go to sleep. Normally there's enough of ambient noise that I don't notice it.
The LCD-2 is actually quite sturdy--at least mine is. The wood is fine and the blocks on mine never cracked, so even though I did get the replacement ones from Audez'e, I haven't had to use them. It's the heaviest headphone I own but it's comfortable. Some people are more sensitive to the weight though.