I use Speedcross for shorter events but as I am heavy footed I find they don,t have enough Cushioning for the Spine. Hence my use of XT Wings. The soles of your feet are going to take a real pounding. Any feel the ground fell type shoe will probably be to thin.
Using two pairs of insoles and two pairs of sox helps.
Whatever you choose they must be a shoe that never gives you blisters. This should be your highest priority. The grip on the sole is also a consideration . If you use Solomons then go for ones with" Contragrip" soles. I found this type great on wet slabs , ice , mud and stones.
Avoid any shoes designed by race winners which are even lighter than last years model. You want a Ford Focus on your feet not a Ferrari!