Nelito - It is not so much an advantage to Sonar to run as an Administrator as it is a way to deal with old-outdated FX and VSTs that have improperly implemented security. Those that write to restricted directories or do unsafe updates to the registry will fail unless the user is an Administrator.
All of my components are modern and do not violate the OS security rules, so for me there is no advantage to running as Admin (but it is a real security risk). I do have to install and license X2 as an Admin, but it runs just fine for me after this has been completed.
Glen