First, welcome to UU!
Second...if somebody held a gun to my head and forced me to choose I'd probably say Mahalo just because there are at least a few people who find them playable. However, all of those are pretty much the bottom of the spectrum - they probably all rolled off the same assembly line, for that matter, so there isn't a lot to choose from among them.
Third, don't even think about buying a uke, especially an inexpensive one, from anybody but a bonafide uke dealer that will set it up for you (this eliminates all of the major "big" online and B&M retailers, Amazon.com, Guitar Center, etc., etc, etc.) The ukes you mentioned come from the factory varying from almost tolerable to complete rubbish - and the big retailers just snatch a sealed factory box off the shipping palette and send it to you without so much as looking at what's in it.
John