So I've had a pair of Lunar Racers for a year and they're starting to fall apart. I'm gonna buy some new ones but don't know what to get. I'm looking for something light, but something I won't get hurt in if I take 'em to the roads every once in a while for a progression run or pick-ups...and I do a lot of long workouts - about two a week of 8-10,000 meters each. I've been looking at the Lunar Racer 2's, the Streak 3's and the Streak XC 2's but I'm not limiting myself to them. Any reviews on these shoes or suggestions for others?