I'm looking at the Speed Star 4 and the Launch. I've managed to get mostly off of my heels, so I'm looking at these two shoes for my next set of trainers. I was looking forward to a more solid feel in the Speed Star 4s, but worry that it won't feel as comfortable midfoot due to the plastic piece underfoot. The Launch looks like it gives a smoother transition, though the sprung toe crap does not excite me (not that the Speed Star toe looks very different). What does LR think about the two for midfoot striking?