The Guardian is for sure one of the best Bowtech has ever made. I've had my Commander since they first came out, and still really enjoy shooting it. With the Guardian, you'll get a dead quiet, easy to draw, excellent hunting rig. With the 101, you'll get a real speed demon. More aggressive cams, little more noise, and not as forgiving as the guardian. The Airborne that I've shot a few times was a 60# version, and at 60#, it was nice to shoot. With as much speed as that rig produces, and you shooting 50#, you may be better served by the 101st. You can't go wrong with either selection though.