I've got some of the SO Fusion pants. If you're worried about getting hot, then you don't want them. I wear them every game no matter the weather and I really wish I didn't have to. It gets really hot, they're great pants, but they don't breathe well. I know this didn't really help to choose the right one, but I hope it will help.
On another note, I think the SO digi is pretty close to MARPAT. If the pattern is the same, the Ultralites should be good. I'm actually thinking about trying them out for myself. Good luck.
