lens reversal and extension tubes are handy to have, but so far that I've seen, for both ease of use and better quality the use of a true macro lens is usually provides for better overall quality and experience.

This doesn't mean to say that neither of these options don't work .. they obviously do.

KEH is good for product and decent prices .. but like I said earlier .. a bit over the top for shipping.

there's probably a reason for that tho .. maybe their packaging policy is very high quality or something?