How easy to use does it need to be? I'm using Joomla for a community site I'm building (
link) but it's really complex compared to what I use elsewhere, a combination of
Wordpress for the blog and
Gallery for pictures. See my
Elise website for an example of these two integrated (though note that the theme is not IE-friendly; it's entirely possible to create a theme that integrates these two in a manner that renders cleanly in IE though). Integration of them is not perfect, but can be OK if you're not too picky. I wouldn't recommend Joomla for a site that's merely a blog and photos, it's massively overkill for that and much harder to administer.
With any of these options, you'll find plenty of free downloadable themes available.