Don't get Nike. A guy that is on this board and works for 'em in the UK said Adidas are a better quality. But idk I've never had a pair of Adidas, haven't had a pair of Reebok's since Dee Brown made 'em popular in The Dunk Contest. Lol I ordered a pair of Nike Metcon 2 last Thursday, really liked Nike Hyperzoom Trainer 2, but the Metcon 2 would be better for doing squats and would still work on the treadmill...I think/hope. If its just a shoe for the treadmill you're looking for check out Hyperzoom Trainer 2.
Here's a thread I made bout both shoes.
Nike Metcon 2 or Nike Zoom Hypercross TR2 | MESO-Rx Forum
I have squat shoes. I have deadlift shoes. I'm good in that department. I am currently running in my old airmax but they are every bit of 4-5 years old and have no tread on the bottom. nikes fit my feet better than most brands. I've been checking the out the new airmaxs but having a hard time swallowing the 190 price tag. Also been looking one of the lunar models too. I'll check out the ones you mentioned for sure.
I've just been putting in a decent amount of cardio the past month or so and want to keep up on it. I'll let you know what I go with once i can get out and try some on