You could try Kanotix (http://kanotix.com/info/index.php), I did, and I like it quite much. It's based on Knoppix technology, but modified in quite some ways (I don't know the exact details, but I like it much, because it detects all my hardware on both PCs I tried it with). If you know Knoppix, you will feel at home instantly, because it is so similar to use.