I own an FZ-18 as well. Great little camera, but you're right, it's no DSLR. It does take decent videos, though. However, it's limited as far as zooming while shooting vids, and that may be enough to switch to a DSLR for vids.
My friend has a D5100 and up until two days ago he loved it. But just as he got to Florida on vacation it locked up on him. It's stuck electronically halfway into Live View mode. Nothing he does will free it up. He can't change settings or anything. Not sure if this might be a more common issue with them or if his is a rare occurrence.
"I know rocks. Rocks are hard."