Originally Posted by metal571
Can always try the Corsair M45 or the SteelSeries Rival or Mionix Naos/Avior 7000
I wouldn't go to Corsair or Mionix to replace the Deathadder. If you're wanting something similar to the DA, I'd have to recommend the Zowie EC1 EVO. It's damn near the exact shape, size, and weight as the Deathadder, it has a fantastic sensor, and great build quality. You'd have to adjust to the weird DPI steps and super low LOD, but I love them.
The other, easier, way to go is to pick up a Deathadder Black 3.5G. They're still widely available and give you that shape with a great sensor and mine have all been bullet proof. The only downside of the mouse is the ridiculous LOD, and that can be cured by a tape trick.
I've heard some people moving from the Deathadder to the Rival and being pretty happy. I own both and have no idea how that's even possible. They are entirely different shapes and sizes. The deathadder is smaller and has a very simple shape, while the Rival feels much more substantial in the hand. Longer and taller. The sensor on the Rival is superior (although I haven't heard if the new Firmware fixes the random DPI issues), and I do love my Rival. I just wouldn't put it in the same class as the Deathadder as far as being interchangeable.