Do you suggest using a teleconverter with a dedicated macro lens? I have tried out using a Kenko TC with canon macro lens - however I am not 100% satisfied with the "extra" magnification that I got on the cost of loosing some of the available light and the quality of the image. I have read that using an TC will work wonders if you're shooting under ample light. Any suggestions? Is this a cheaper solution for magnification ratios more than 1X?
Here is an example of what I got with the extender (sorry I did not have a chance to get the same shot without extender)
Click on the image for a larger version in flickr