What are the appropriate steps to update BusinessObjects support packages?

Hi guys,

I've installed SAP BusinessObjects 4.1 SP2 on the production server and I never update any patches. Now, I think the BusinessObjects 4.1 has six patches for SP2 (patch 1-6) and another new support package 3 (SP3 patch 1). Which one should I choose to update on my BO server in case I prefer the most stable patch?

Thanks.