Knowing full well that BFL was viewed as Satan, KNC delivered their first batch more or less on time and it was a success compared to the likes BFL and Avalon Batch 2/3.  With that good raport they built up they milked buyers for tons of capitol which they then proceeded to use to build their own farm at their own customer's expense - not only were they driving up difficulty reducing earnings for past customers they were mining on their customer's hardware stealing from present customers.

So by all means KNC would be a great choice 

There are better choices mentioned in this thread.  Please take time to read detailed responses like that provided by joust a few posts above.