We are configuring challenge with Netflow 3750X module C3KX-NM-10G for manage engine netflow analyzer. System Image flash: flash:/c3750e-universalk9-mz.122.58.SE2

We're facing high cpu utilization on switch for that, please recommend solution, if upgrade IOS then share the upgrade path from from 03.02.03.SE to 03.06.03E.   Please suggest stable version for cisco 3850, if anyone have experienced ?   Switch Port...