vun: Gotcha. Thanks for LMK.
I honestly tried a bunch of other mice that used the Avago Laser sensors, too, like the G9x, and the Logitech G700, and I never had a problem with acceleration, either. I also know a lot of high level Starcraft 2 pros use mice using the same sensors, too - for instance, I know Taeja uses the G9x, and both MVP and MC use the Sensei. Then again, these are RTS games, so maybe it might be different with FPS's.
Regardless, I just thought I'd ask for more opinions. =P Thanks again for letting me know.
Also, I miss the Lachesis A LOT. I know the Taipan tries to follow a similar form factor, but the Lachesis was just... it was something different than all the other mice out there. Something about its shape made me want to whoop ass in games. Definitely one of the mice I most regret returning.