I have narrowed my decision down to the Mathews Switchback XT or the Bowtech Tribute. Im leaning towards the Tribute because I really like Bowtechs and of course the fact that the Tribute is faster. My question to those of you that have these two bows is how are the factory strings holding up? I really like the Winners Choice strings but hate to pay so much for a new bow and replace the string and cable right away. Has anyone had any problems with the strings stretching? Thanks..