Had no idea ADA was PoS, thanks guys.
I'm also looking for good PoS coins, but they often require an important amount purchased to be interesting/rewarding.
However, in ADA we're still at the bootstrap era. Once we go on reward era (Q1 2018) and actual staking will commence, rewards will be specified along with the computation layer which will be capable of doing smart contracts under K framework. If that does not excite you I don't know what will.
It's not just PoS.. it's DPos as I understand and it uses the new peer reviewed protocol Ouroboros