So far the biggest contenders I have found for this are:
In context, the next project I'll probably be using this for is a blog/article-like site. Similar to a Wordpress site in some ways, though this particular site is very specific to its owners needs and we prefer the custom approach for flexibility (and future scalability). So any frameworks I use would be geared towards article-based content (and interacting with such content).
So now then, does anyone have any solid suggestions or recommendations? I'd love to hear about past experiences with any frameworks, ease-of-use and impressive or favored features.