We just got the Cardiac in this morning, so I've only had a chance to play around with it today.

I've already posted how I feel about the Guardian; awesome bow after you get it drawn back [at 70#.] I've shot it a bit more since then set at about 64# and will admit that it makes quite a difference. Its an excellent bow, but I still prefer my Allegiance.

The Cardiac was... a bit interesting. It is significantly lighter than the CR334 and CR337 which we've had in stock for quite some time. It's a bit stiffer to draw than I was expecting, but I suppose you have to give something up in order to get more speed out of a single cam bow. We shot it through the chronograph with a 393 grain arrow, 29" draw, at 70#and consistently got speeds of 288 fps. Not too bad, really. There was more vibration in the grip at the shot than I had hoped and it liked to jump a bit. Threw on a Wild Thing and this cut both completely out. As far as single cam bows go, I'd choose the Black Ice over the Cardiac even though I'd lose a bit of speed.

If I had to choose between just those two [Guardian and Cardiac], I'd probably go with the Cardiac.