For the professional chef, this depends entirely on the nature of the business. If space is not an issue and the kitchen in question cooks set quantities, then a set of tabletop sous vide water baths such as the Pasto range would be perfect.
If chefs are limited by space, then a set of sous vide water baths that are built into the countertop or a set of immersion circulators are more suitable. This allows better flexibility in the kitchen. Grant Creative Cuisine offer the solution through the Vortice.