Thar shape of the 302/303 is hit our miss. Some people don't mind it. I personally HATED it. Otherwise it is a good mouse. Razer/Zowie build quality is questionable. Razer has button failing issues while Zowie has coating issues. IMHO in this price bracket there are better options.
I would consider the following mice...
Roccat Kone Pure Military
Mionix Castor
Logitech G303
Haven't heard of any other mice that didn't have some sort of objective major flaw with sensors, build quality, coatings, or weight.