i all ready heard all the coins the you mentioned on the op and all of them are verry promising because they did already reach the top spot among other altcoins although if i had to choose one id say that would be waves . why waves ? simply because waves is a major altcoin and it is being used by most ico's to create their own token ( just like on eth ) and actually waves made a clash v.s eth before but sadly waves didnt win the battle , thats why eth is still taking the lead with thier erc20 coins .
Same here! I actually do not know much about Zen at all, but Waves is of all of them the one with the best developers, not because I think their technical skills are better than others but because they focus always on the technological development and not the marketing. This is unlike NEO at least, who does a lot of marketing.
Waves tokens are still being created and used, and slowly you can see volumes building up, all this even though price cannot really climb high. Always below $5 for a long time except in the bull, means to be stable price for a great coin and great platform.