Both companys make fine bows. I used to shot a Diamond Marquis but have updated to the Bowtech Extreme Solo SD. I loved the Diamond for its lightness but there was some hand shock involved. I have noticed that the shock is gone when shooting the SD.

Don't let us tell you what bow to buy, go out and shoot as many different bows as you can you will find the one that feels the best to you. You'll know when you find and great shooting bow. Good Luck.