This is a recent thread that hashes out some of what you're after, particularly toward the end. Capacitors.. which ones for which applications?
I know your question has been discussed here before, I just can't seem to put my hand on the thread right now.
And a link from that thread that gives some data and a direct answer to your question.
Cables, Interconnects and Other Stuff - The Truth
And in the end, you'll find this is a hot topic with many opinions. I'd say grab some caps and see for yourself.