I've been a life user of Nike... until I discovered Mizunos!  I highly recommend that you go to Mizunos website and use their program to determine which shoe is perfect for you and your feet, then come back to order from Amazon, as the prices are better. The program on Mizunos site recommended the Wave Nirvana 8 for me, and they are FANTASTIC!!  Its as if these shoes were made JUST for me.  HIGHLY recommend these shoes!

UPDATE: Five months later and these shoes are still superb!!!  If you make sure to order the right shoe for your foot (using Mizuno's program on their website), you simply cannot go wrong!  By far the best shoe I have ever owned!