Help deciding whether to Patch, Upgrade or Fresh Install

Question

Soon we will be upgrading one of the Oracle database targets to 11gR1 (11.1.0.7).
Here is the existing OEM Grid Control configuration:
* RHEL 4 Update 1
* GC 10.2.0.2
* Repository: 10.1.0.5 (single instance)
* Agents 10.2.0.3
* 17 Hosts targets
* 13 Database targets
* 10 User Defined Metrics
To monitor the upgraded 11gR1 target database, I have the following options:
OPTION 1) Patch GC to 10.2.0.5
OPTION 2) Patch GC to 10.2.0.5, then upgrade to 11g (11.1.0.1)
Installing the 10.2.0.5 patch set would require less effort than upgrading to 11g, but let’s suppose the final goal is to upgrade to:
*RHEL  5 Update 2 (on a new virtual server)
*GC 11.1.0.1
*Repository: 11.2.0.1
Knowing we have Option 2, I wonder if there might be third Option. For example:
OPTION 3) Fresh install of OEM 11g Grid Control and manually add targets and UDMs
My question is Option 3 feasible and would it be less effort than Option 2 given the ease with which agents can discover various targets?

Answer 1

Choose Option 3