In reply to Mohanraj B.

It's difficult to provide advice for your specific scenario, but I don't think that there are any technical downsides to installing the latest client applications (SAS Enterprise Guide, SAS Enterprise Miner) at the same time that you move to SAS 9.3. Each of those applications has a version that goes along with SAS 9.3, so you'll be "in sync". SAS Enterprise Guide allows an admin to configure capabilities using roles in metadata, and if SAS Enterprise Guide is part of your 9.3 deployment plan you'll be able to configure that when you install 9.3.

In general, it's good to install/configure all of the software you plan to use at one time, rather than have to go back and add items to your installations later. But either path is supported, so your choices should depend on your capacity to install/test and train end users.