I upgraded from the A3's to the A5's almost three years ago and have been enjoying them tremendously. The A5 is a great speaker that plays above its class.
I run them with Mac tube pre and power and have added two B&W DB3D's. I am a solid Phil zone guy and the subs come with their own power. That is my rationalization and I am sticking to it.
I netted $9k for the A3's and added another $12k for the upgrade. Not cheap, but they got me off the speaker merry go round and in a place where I carve out time to spin vinyl.