Not many on here would advise you to buy a cheap 125 from a Chinese manufacturer. I had a Chinese scoot once it was made of cheese and soft metal, and was built to last about a year and then die. That said, I've heard people say that Mutt score above average on quality and perhaps WK do, too.
The best thing you could do, if budget allows, is get yourself something like a second-hand Honda Shadow 125. I'd suggest a VanVan 125 too, as it has a cool retro vibe, but it's low seat and low power means it's probably not a good choice for a 6' tall bloke. But the Honda will give you a big quality hike over the bikes in your list, and you'll be grateful for it whenever you get your spanners out and find the bolt comes out unstripped, and the nut turns without the heads rounding off.