Peter,
Go ahead and buy those
2-Farad power caps and connect them between your amp's power rails. Beware that these can tolerate only up to 20V DC, so you will have to connect ~4 of them in series for each of the plus/minus power rails, depending of your amp's rail voltage. That will still be a whopping 0.5 Farad. You will surely experience a HUGE improvement in dynamic range and sound stage, and feel as if Yo Yo Ma is playing right in front of you. But in order to get these effects, you will have to display those 8 big capacitors prominently in front of your amp. A slight inconvenience in ergonomics is a small price to pay...
