Stainless steel kitchen sinks: 50/50 bowl size or unequal bowl size?

[Sandy Uhlmann]

I am putting new countertops in the kitchen of a rental property that I am rehabbing. I plan to put in a double bowl stainless steel sink but I am wondering if the standard 50:50 bowl size is still the way to go or is having unequal bowl size the new trend? Also, are the box stores the best place to shop and get the best price for kitchen sinks?