I need some advice on running shoes to purchase. I currently run with the saucony ISO triumph and really enjoy the shoe. I. Have read poor reviews on the saucony ISO triumph 2 and I am hesitant to purchase. My background: I am 5'4" weigh 136lbs and train for half marathons typically logging no more than 70 miles a week. I run primarily on hard asphalt type surfaces. The wear pattern on my soles shows greater wear at the heel area although most of my wear is at the midsole. I am not sure if I am a heel striker. I have had salesmen at running stores observe me running and the feedback is I am a neutral runner with a normal mid foot striking pattern. I have read good reviews on the brooks glycerin 13. Can anyone make a suggestion? Thanks.