ESS version to be used

Dear Experts-

In our implementation we have decided to install a ECC system with EHP4. But we are not turning on any of the enhancement pack functionality. I am in fix which version of ESS Business package we can use. I did check wiki below. But still not sure which version to install.

http://wiki.sdn.sap.com/wiki/display/ERPHCM/HOWTOGETRIDOFSPSTACKMISMATCHISSUES

Your valueable suggestions are appreciated.

John.