I'm starting my base building right now and I currently run in asics mateo. Its ok for me with just enough cushioning. Now what I am curious is to what you 100 mpw runners run in. At that rate, you must constantly buy shoes every month. I think I'll stick to racing flats but I am really curious to what shoes you use. I am looking for a shoe that will last me long. I'm 5'7 and 135 lbs if anyone is wondering.