Thanks for the article, it was quite informative and a nice read overall. I deffinetly agree about Antminer S9 being one of the best miners on the market. I have a batch of them currently and the ROI is amazing!!! I bought them at a nice price (not the cheapest, but considering free shipment and 180 days warranty provided by a store, I'll say - worth it)
Can't vouch for AntRouter R1 and USB miners. But based on the specificationsthere are solid.

But yeah ... Copypasting is bad!