I suggest a Razer Deathadder or the new Zowie AM that is about to be released. Both of these mice run very similar sensors. The Razer runs a modified version of the Avago 3090 and the AM uses the 3090 if I am correct.
The Razer has had proven results as one of the best sensors in the market, but suffers from a high LOD (Lift-Off Distance) and some complain about the build quality.
The Zowie has yet to be released, but theoretically, it should turn out to be one of the best, if not the best mouse on the market.
The Sensei is a gimmick. I once thought that the shell, lights, features, etc would justify the cost, but it also had sensor issues like acceleration. Then I thought to myself, "Why makes compromises with the mouse if I have to pay more?"
In my opinion grab yourself a Razer Deathadder Black Edition with an Artisan Hayate, and you'll be set.