I'll second the monoprice.com suggestion. I recently ordered a couple of AV cables and about a dozen pairs of banana plugs. My total was like $40. It would have been over $150 if I'd purchased the same stuff at the local big-box electronics store. I will be doing a lot of my 'nuts-and-bolts' shopping at monoprice from now on!
I purchased the other type of banana plugs, the ones with compression fittings. They seem to work well and look great, although it took me a few tries to figure out how best to attach the speaker wire to them!
