Zowie EC2-A mouse
Once you get, tell me how you like it. I'm thinking of picking it up, since it's like the palm grip version of the zowie fk.
The only complaint I have heard is the scroll wheel being rather flimsy...
I just got my EC2-A last week and have been using it on my Mac (haven't built my PC yet) and I absolutely love it. It fits my hand in a palm grip (18.5 cm length) and the coating works well with my greasy and somewhat sweaty palms. Zowie must have fixed the scroll wheel issue because my scroll wheel is sitting sturdily on the mechanism.
The main problem with the scroll wheel was that if the user scrolled one notch up or down it wouldn't register until the user scrolled at least two notches in that direction (so 2 scrolls would represent 1 scroll on-screen and so on...). Luckily my EC2-A doesn't have that issue and it must have been fixed with later models of the EC2-A.
TL;DR It's a fantastic mouse and I fully recommend that you buy it (or the EC1-A if you want the slightly bigger shell) if you are hesitating on buying it. Zowie seems to have fixed some of the main issues that have plagued the EC lineup (wobbly/malfunctioning scroll wheel) for the past few iterations. But then again I could just have gotten a lucky EC2-A with no issues while the other ones are all messed up