Other options include regulated rails or the possibility of using an inductor (or resistor) in the power supply filter. In between disasters here, I've been working on a regulator circuit for the Aleph-X. As of this afternoon, I believe I've got it where I want it and will commence artwork for a PC board. My Aleph-X will draw nearly 7A, so the regulator should also do quite nicely for my Aleph 2s (my rails are more along the lines of stock Alephs, but I biased them harder--about 3.3A).
Incidentally, a tip of the hat is in order to Paul (aka paulb) for graciously donating some P-ch MOSFETs to the cause. Thanks, man.
Depending on the impedance of your load--in this case, meaning high Z--having the extra voltage swing might even be a good thing. Conversely, if you're running a low impedance, you'll run into current limiting when the amp is delivering all the current it can manage.
Grey