While I can't comment on the price/performance, my Ouroboros is the best mouse I've ever had hands down. I've had many of the mice off the stupid "God Tier" chart thing with "perfect sensors" and a cult following. All of them except the Deathadder I've given away because their sensors suck balls for low sensitivity gaming. The Deathadder I gave away because it doesn't quite fit my hand, and the cord kept getting snagged because of the massive distance it has to travel on my Xtrac XXL.
Is the mouse perfect? Definitely not. It is a bit heavy since it has to hold the battery and it's a Razer Product which means it's going to break every year, but it is a hell of a lot better than anything Zowie, Microsoft, or Logitech when it comes to raw sensor performance. I haven't tried Steelseries or Cooler Master mice, but their Enotus tests are a joke.