I am using both plugins, an now I'm wondering if I should ditch the second one. Basically what I want is the ability to, besides the usual sitemap generation, not include certain items, like Archives, and to include the images, both from standard WP gallery and from NextGen gallery. As far as I can recall, WP SEO did create image sitemap with NG images, but had I had some issues with it. In the new version of the plugin I can't seem to find any mention of the image sitemap..
Anyone in the similar situation? Should I keep both plugins or what?