Content generator only good for link building tools, you won't want to use it at all for money site or anything you care about.
If for link building.
You just need something that will a) scrape b) spin
Spinner can be anything as you have to accept that the quality of your article is going to be rubbish.
What you care more is that content is
a) Relevant to keyword
b) Unique enough
Don't worry if it is readable or not, automated content will always be unreadable.
IF it is readable and awesome, most likely the content isn't unique at all.
For link build tool (eg GSA SER) - Just Pick one.
a) Content Generator [SEO Content Machine, Kontent Machine, WAC]
b) Spinner [WordAi, Xspinner, TBS]
If you want content for your money blog or something you care about.
You need to write the content yourself! No shortcuts here.
However you can use content tools to gather research, find you lsi keywords and mine content topics you can write about.
Don't expect content generator + spinner to produce anything good.
Doesn't exist, if you want to know why... I posted about it here:
http://seocloudcontent.com/why-spinners-and-content-generators-will-never-produce-readable-articles/