Check out my thread And The Winner Is... I chose the Dreanalin. I did not like the draw at all on the Guardian. I loved the Cardiac until it started to fall apart while I was shooting it. The string suppressor fell off while shooting it. This is a know issue that Ross is now addressing, but it was a deal breaker for me.

I really like the Drenalin, but I am going to replace the grip. One thing I failed to mention in my comparison too was that the Drenalin had a more solid feeling wall than the Cardiac. Don't get me wrong, the Cardiac had a nice wall, but it felt like I could pull through it.

Bottom line, I put all three through the paces and I like the Drenalin. You couldn't go wrong with any of them though. This one really comes down to personal preference.