Well I sold my IE 800s a while ago. Bought a bargainous pair of Fischer Amps FA-4E and was happy enough.
I'd been wondering if I'd done the right thing in selling the 800s. The Fischers are good, very good. But I was sure something was missing. Then 2 days ago, I came across a pair of unboxed IE 800s on eBay, no accessories apart from medium tips. £70, they're genuine (I'm pro at bargain hunting, yo).
The bass, oh my, such incredible bass. Nothing comes close that I've owned, whether in, on or over ear. And the highs. And everything else. Except the fit and microphonics through the cable (which is also comedically short). Those bits suck. Still not sure how Sennheiser ballsed that up so badly. Awesome sound, though.