Actually Dinero and Neutron will be the best PoS coin because the profit came from them are really good when you're staking.
Neo is the way too similar to ETH then why we would use it instead of using ETH ? In crypto currencies , we need differences and creatives.
Both PoS coins you've mentioned have good rates. I'm not sure how good they're in terms of development, but if they're able to stay in the market, then it shouldn't be an issue. As for NEO, it is very similar to ETH but that's good because we get a variety of options to choose from. The most interesting part about NEO is that it will have the support of the Chinese government opening its path for greater growth in the future.
There is also another similar coin which is EOS, that will be worth investing in the long term. It provides DPoS, smart contracts, and many other goodies which may become the biggest competitor against Ethereum itself. In summary, I think that it should be wise to buy and hodl NEO to obtain free GAS in the long term, while preserving a huge amount of Ethereum to reap the rewards when it shifts to PoS. EOS works similarly to PoS but it requires you to become a delegate to earn some profit.
All in all, there are many outstanding PoS coins in the market, which are too hard to ignore. It'll be up to you to choose which one to invest into, to multiply your capital for many years to come. Just my thoughts