Currently trying out the razer destructor 2 as well as the artisan raiden. The slickness of the destructor does help negate the heaviness of the g700, but there are times when i feels a little too slippery. I also have an artisan Hien (red) but i was getting random tracking issues my laser mice on it.
I tried the Mionix mouse at a friends house and it didn't really wow me. It's really comfy if you palm it, but the ergonomics are kinda lost on me as i use a fingertip grip.