Well, I'm trying to decide between these two shoes. I have very flat feet but my Brooks clunkers are just too high and heavy for workouts. Interestingly enough, Adidas just took the Mana off of is main site five minutes ago (while I was looking at it). It's still available in their store, eBay, etc. The Tempos a little heavier (9.5 oz. vs. maybe 7.5 oz.) Im not sure if this extra weight is helpful or harmful, but I'm leaning towards the lighter Manas just because I'll only be using them for workouts and I like lightness in that case. They also look like they have a low heel; I hate higher heels. Opinions? Experiences? Thanks.