The one I'm most familiar with is Decent. It has a very good roadmap, and strong Chinese connection.
ATMChains sounds like it's going to be a huge project, especially in China, and it's built on top of Decent.
ATMchains is sponsored by Jiangsu Huaxin Blockchain Research Institute of China, which is back by the Chinese government.
https://www.coindesk.com/chinas-government-backing-massive-blockchain-research-effort/They also invested 15 million Euros into RFintech, which will further help it spread around the world.
http://blockchain-finance.com/2017/08/12/atmchain-foundation-invests-eur-15-milion-in-rfintech/But better than that, it's the actual purpose of ATMchains.
So because of all that, Decent is my alt of choice. Granted it's the one I hold more off. Then again the reason why I hold more Decent than others is because of the things I mentioned and not because I randomly invested and just want others to buy because it will benefit me.