Moved from an Audigy 2 to a TB Montego DDL. Games sound equivalent, but music and DVDs are NOTICABLY improved, and this is with a set of cheap Logitech X-somethings I got for under $100 4 years ago.
The thing I noticed the biggest difference in though was the stability of the drivers and the lack of bloated crapware.
How on earth did Creative get to their position of market dominance?