So you should look for decentralized, fewer house wins (%1.5 or lower) and a place you are not the only gamer. That would be a good choice.
There are some site like stake,windice and bitsler which have 1% house edge .
And these sites also run a great give aways and challenge for their gamblers,
So that is why I consider them as the best because they are also sharing some of their profit back to their gamblers.