As you may see, Ethereum faces huge competition right now.
I just would sum up in two words the current market state,
taking in account development state of those rival platforms and their current prices.
The best long term choice might be EOS. But it is a really very long term.
The best option to buy right now is WAVES.
Another good option would be ANS if it rolls back to 0.002-0.0025 btc.