EDIT: Ordered an Ec2-A. :>
I'm currently using the Zowie EC1 Evo, but I'm having huge issues with the sensor/LoD. I tend to slightly angle the mouse when I do fast swipes which makes the mouse stop tracking due to the stupidly low LoD, and if I consciously hold the mouse down when I do fast swipes it tends to bug out (usually it will move along about halfway and then jump upwards). I'm using an Artisan Hayate pad, and I have the same problem on my QcK+.
Before the EC1 I've used the MX518 and G400 and I loved both of them (they stopped working after years).
So tl;dr: I need a mouse with a sensor that can track at high speeds and doesn't have a really low LoD. Preferably non-ambidextrous.
I've been looking at the EC1-A and the Rival 300, but the former still has a really low LoD and I've heard some people say the latter has issues with cloth pads. I wouldn't mind another G400 but they cost like $100+ now.
Ideas?