I also shoot the GT XT's but from what I've experienced with the GT's if your shooting a bow with some speed and your arrows are on the longer side (mine are 29") the 5575's are pretty weak spined (even on my Icon set at 64lbs). The 7595's remedied the problem. I really wish they would change their arrow labeling[&:] Too many people think because they say 5575 that they'll cover anything from shooting 55lbs to 75lbs and that just isn't the case.