As an owner of both DI's and Pistons I would have to say I like them both. I like my GI's because of their proven reliability and like my Pistons because all it takes is a quick wipe down and they are clean. It really just depends on what you want it for. Here's a chart of DI's, hope this helps. Scroll down for the chart
http://spreadsheets.google.com/pub?k...=5&output=html