money strategy games

What do you think is the best?. At the moment I am playing several to see which I like to play a proper play threw. These are.

X3 Terran Conflict.

Sim City 5.

Endless Space.

The thing is X3 seems too slow, SimCity 5 I take too serious and delete every time and start again.

Endless Space I don't like the space battles as don't no what cards to use for best battle but I do like the money strategy and resource side of it.

Which do you think I should stick to and keep playing?.

Finish Sim City 5 then any of the other two. Finish the games :). Have fun that's what is important.