I ran the Asics 21xx series for 10 years.  After a bout of plantar fasciitis (walking barefoot) and after I developed arthritis in my great toe, I thought I needed more shoe and moved up to the Gel Kayano.  Another great shoe but I probably don't need that much support. Once the minimalist trend took hold I contemplated slowly transitioning to less support.  The first step was to the Gel 1170.  This is a fantastic shoe.  Fits like a glove.  Lighter than the models I had been running but with enough support and cushioning for my 170 lb frame.  I now alternate the 1170 with the DS Trainer.  I have not had an injury in the last 6 months and my times have dropped.  I am one happy customer.