Help me to choose the best option

[rodriboost]

The last 3 months I researched about the best mining equipment, and ASIC´s machines it seems be the more profitable.
I worked very hard and finally I have the money for invest in one antminer. (L3+, D3 or S9)

waiting new bitmain batches, I need of your help and experience guys to decide which antminer is better option to buy  

Thanks in advance.