I'm 1000% completely happy with the sound off my D7000. I don't wanna tweak ANYTHING about them. The bass is perfect, the mids are perfect, the treble is JUST the way I like them, sparkly. The LA7000 would make the bass more subdued, the mids more forward (I don't need them any more forward), and the treble smoother. 3 things I DON'T want or need. No thanks. That and I don't even like the modded woodies. The stock D7000 cups look the best, IMHO.
If I wanted an 'improvement', I'd rather just save up on another pair of headphones with a different sound, which I have absolutely no interest in other than mere curiosity in the Ultrasone Pro 900, LCD2, 325i, RS1i, and the high end Stax models. That's pretty much it.
I have found a headphone I'm honestly completely happy with otherwise, that is the D7000. Seriously, they really did cure my upgraditis. Everything else is a sidegrade to downgrade, as I would never spend more than what I paid for these ($600).