I can recommend G pro wireless great mouse and great batter. Tried the Ec2-b divina which is also a great mouse but wire is kind of shit and even tho zowie has great shape they are getting outdated imo
the viper ultimate is the opisite of the za12, the za12 has a big hump at the back which i think helps for control, but the viper is flat at the back and alot harder for me to get a consistent grip on. i would have to use fingertip which is not my favorite grip
Actually razer is currently not overpriced, viper ultimate competes very well with g pro wireless in price (often going on sale for cheaper) without the reliability problems that logitech mice often have like double click issues.
i see, but if i where too recomend a mouse for csgo, then i would say either of the vaxee mice. If you want ergo then get ax, np-01 if you want a s2/gpw kind of shape with a curve, or the np-01s if you like more of a flat back
I'm using mx518 legendary. The only thing that I complain about is not having the wireless option and side grips. Other than that, great mouse.
But it all comes down to the shape, it might not suite you