Taipan has irremovable cursor smoothing/modifying according to reviews. Razer even managed to mess up the ADNS9800 more than it already is! Great shape on that mouse though
There was rumour that it is fixed by a new firmware or patch.
My favourite, after owning G500, Salmosa Asia Progaming edition, and Roccat Savu, and had my hand on Sensei, Imperator, DeathAdder, Kinzu, Kana, Recon, M60, Level 10 M, R.A.T. 5, IE 3.0, etc....
My favourite in terms of shape is IE 3.0, but in an overall package with the shape, buttons, drivers/software, materials, my favourite mouse is Savu.