Thousands of both types have been manufactured and are in service around the world. Its important to note that 500-series aircraft ceased production with the end of the Encore+, while 525-series have been in production since the early 90s and there are four 525-series models currently in production.
As a low-time pilot with little or no turbine time, the costs involved with buying your own type rating GREATLY exceeds the increase to your marketability; additionally, unless you go to simulator training you likely won't be insurable ESPECIALLY as a low-time pilot.