I don't have quicktime, but use quick alternative.
I too don't like the way it wants to take over the world if you don't reverse defaults when installing and after updates it tries it on again.
Take care on updates as the orchard will try and slip safari past you as well and possibly itunes or is it the other way round if you have itunes it will try an slip safari and quicktime past you. In any case read any update screens, don't take anything at face value and whatch for what is selected for update/installation.