Okay...first, a disclaimer: I'm a big FF fan since I put them in for the first time (in my LOTR). The first time the floor shook, I was a customer for life. They're in all my machines except WOZ.
I upgraded my ACDC speakers to FF...and yes, it WAS an upgrade. HUGE difference in bass response, and it smooths out the ringing high end on all machines, including ACDC. With that said, since he has allowed the option to buy the speakers without the volume control, I will probably pass on the volume control unless I have a machine that bothers me without it. It doesn't seem to be missing anything on ACDC, and I'll be putting FF in AFM and POTC in the coming months as well...without a volume control.
So in closing: My God, yes...get the speakers for ACDC. But the volume control? Not so much.
(I also added a Polk PSW-10 subwoofer after putting in the FF speakers, and there was no noticeable difference. That's how good the FF speakers are.)