Steelseries Rival, Razer Deathadder, or Zowie EC-1a?

[Yn Crashout]

I've narrowed it down to these mice, for use at 400 DPI (or maybe 800).

Also, I intend to use mouse accleration. inb4 mouse accel is bad https://www.youtube.com/watch?v=KORL144_co8

The reason why is because my sensitivity in-game is 1.22, a 135 degree turn across a Steelseries QcK. I was at 1 or 0.9 something, but I tracked better a little higher and still had great reaction shots (playing L4D2), and I need to be able to 180 in one swipe but still retain otherwise my precision. I came to PC because I was amazed by the precision the mouse offers and the limits of the body.

Does anyone have experience with the Rival's hardware acceleration option? Or would I be better off getting the EC-1a because it is completely driverless (the driver in the video requires that you have no other mouse driver installed; you COULD set it up in the driver, then uninstall it and have it be hard-wired how you want it... i don''t use macros and all that.

EDIT: Is there a mousepad large enough to where I wouldn't need to use that drivera nd can 180 in one swipe? I imagine SOME mousepads just don't make sense because there is a limited to how far your arm can go and reset smoothly and that's genetic lol.

I have a 33.5 (33.532, rounded) inch 360.

EDIT: Or should I keep the QcK? Point being that considering length of the arm and the optimal way to quickly swipe (movign a certain distance and resetting vs potentially stretching on say, a QcK heavy, I've never used a super large pad before) Would a larger pad cause me to get used to being in an awkward position?

[Wicked]

I'd avoid Razer Deathadder for their terrible inter-connecting driver. I found it too big for my grip style. Mouse itself was pretty good but all the driver nonsense surrounding it as well as razers firmware tool bricking it twice I'd say avoid it.

I myself use the Zowie FK'14, and I love the fact that it has no annoying drivers or needless functions. It's perfect out of the box, limited settings. It simply performs.I use my Zowie with a QcK+, enough space for me, but milage may vary of course.

No experience with the Rival.