[lil fu fu girl]

I think that you getting her off Iams, and transititioned onto a healthier diet, is a fantastic idea. Iams contains corn and chicken by-products as their main sources of protein; needless to say these are not so great.
If you are planning on sticking with kibble, then I would go with one of the two that you suggested in your thread, as they are a higher quality complete protein kibble. Which in turn means a healthier body and healthier organs that use protein, such as skin and hair.