My little boys call all things by their purpose. It is not an 'excavator', it is a 'digger'. It is not a 'whisk', it is a 'whisker'.
There are a few keys to finding a really good whisk.
1. Find a whisk whose wires do not touch each other. If they do, this is a place water can sit and rust your whisk.
2. Make sure that the end of the handle the wires go into the handle is sealed somehow; otherwise, dishwater or debris may collect in the handle, seeping out while you are whisking something yummy.
3. Buy the right whisk for the job. There are many styles out there; go to a kitchen supply store where a clerk can assist you in choosing the best one for the job. For a general whisk, I prefer the French style, pictured here:
I have found one website that sells a multitude of whisks of all shapes and sizes. It has the best explanation of what makes each style unique and shows examples of what they all look like. You can search online for "Fante's Whisk" and have a look at the multitude of shapes and sizes listed on their site.
To me, it is more a matter of what you like and will use. No matter how awesome it looks in the store or in your drawer, if you do not end up using it, it has not served its purpose.