The biggest benefit of a triple bowl kitchen sink must be the option to carry out many chores at once. One can be used for draining the washed dishes leaving the other large one free for other uses. The smaller middle bowl is handy for washing through veg and fruit or for food disposal.
If you find yourself spending too much time in the kitchen, having another two bowls may help.
I would suggest obtaining the largest version that will suit your requirements. This will help when it comes to washing the larger pots. The squarer types will also provide you with more washing space.
In my top five selection listed below you will find products that have good feedback from users. See them here.
Triple Bowl Undermount 16 Gauge Stainless Kitchen Sink
Stainless Steel Triple Bowl Kitchen Undermount Lustrous Satin Sink
Kitchen Triple Bowl Heat, Stain and Scratch Resistant Sink