Finally found the video I've been meaning to post:
This guy has 12 banks of 6 3k farad caps for a total bank capacitance of 6k farads... I looked up his amps, and at full tilt they are capable of pulling a combined 20k watts @ 14.4 volts. Beefy.
He also talks about the differences between caps and batteries, which is probably the most relevant part of this video as far as this thread goes.