I want to now copy Q1 to Q2, install EHP5 and build my QA.
The business/testers/ABAP are requesting that we build Q2 from Production (P1).
The quality and sandbox systems are often refreshed with the production data and I believe the Q1 system was created in the same way long back. So if you want to create a new quality system (Q2) then using the production backup is the best option before starting the upgrade.
Regards
RB