Around here , most people would recomend a professionally built set of spoked wheels, built for your weight and riding style.

Pre-built wheels are mostly the marketing dept getting you to buy all the components from one maker. They are hard to maintain, and sometimes need to be sent back to the factory or bike shop for servicing.

If you need an aero-wheel for time trial competitions, or want some ultra-light race-day wheels, then pre-built wheels have a slight advantage, but for regular riding, they have little , if any, advantage and cost twice as much.

There is nothing particularly wrong with Mavics, they have excellent bearings and ride well.