I am in need of new road running shoes (3-6 mile racing normally) and am a neophyte in this area. Any recommendations? I am looking at Asics GT 2120, for $70, or New Balance 1000 for $40. Any reviews on those shoes or rands would be appreciated, or just advice on what the best stuff is. My price range is basically between $40 and $70, but closer to 40 would be nice.