I am personally not convinced by your reasons to shift to IT/ ITES industry. In my opinion, challenges for an HR person are far more in industries which are labor oriented.
But HR, as a profession, is industry independent since it relates to life cycle management of employees across the organization. Only difference is in the framework of policies & processes to manage people. And this difference may be there even between different companies of the same industry. What I mean to say is that one's contribution to the organization, as well as personal growth as a professional, is certainly more through continuity, within the same industry. You hear so often about concepts like 'HR as a Business Partner'. How can you become an effective business partner till the financial aspects of managing a business are clear to you? In this respect, each business vertical differs from the other. So by migrating from manufacturing to IT/ ITES, you don't merely have to learn about their HR policies & processes, but also about the management of business in an IT company. Believe me, it is a tremendous task, not worth attempting, especially when the same effort can carry you far ahead in your existing environment.
Change, for the sake of change, is seldom beneficial unless undertaken after due diligence, introspection and analysis.