WSUS Patch Management

My organization uses Microsoft SUS 2.0 as the patch management solution which is now obsolete. Because of this we are behind on Microsoft critical security patches and plan on upgrading to the much talked about WSUS technology. According to Microsoft there isn't an upgrade path from SUS however you can still be able to migrate SUS contents and configuration settings. I hope I'm correct in saying this. What is the best approach in implementing WSUS leveraging off existing server infrastructure used by SUS?