Supplier Lifecycle Management best recommended deployment scenario

Hi Experts,

Please suggest for SLC Deployment best approach, with pros & cons. We came across below scenarios, but not sure which scenario combinations of Buy side and Sell side is best and recommended :-

Supported Deployment Modes for the Buy Side of SAP Supplier Lifecycle Management

1. SAP Supplier Lifecycle Management 2.0 as a standalone option
2. SAP Supplier Lifecycle Management 2.0 as an add-on to SAP enhancement package 3 for SAP Supplier Relationship Management 7.0
3. SAP Supplier Lifecycle Management 2.0 as an add-on to SAP Enhancement Package 7 for SAP ERP 6.0

Supported Deployment Modes for the Sell Side of SAP Supplier Lifecycle Management

1. SAP Supplier Lifecycle Management as a standalone option
2. SAP Supplier Lifecycle Management as an add-on to supplier self-services (SUS), which is part of SAP Supplier Relationship Management 3 for SAP SRM 7.0

Regards,

Gaurav