I've always gone with the NB MD500s for track season and they've done alright for me, but I want to try a different spike and see if it'll work better. I'm split between these 3 spikes, but I've been leaning towards Victorys because I have a mid/forefoot strike, but at the same time I've heard lots of bad and good about it so I'm not sure, and I've heard they're for faster runners but I'm still a little shy of sub 2 and have a 4:50 mile. The dragonflies seem like a safer bet, but they seem to be more for 3k and up. I don't know much about the NB MD-X but it seems worth considering. Which one would be the best choice in this case, or if none of these, what would work better?