"cheap (but not crap)" is a colloquialism for: 'low price value'.
I've been reading this site for a while now. I've never seen a post where someone just keeps using the first eq. they buy. So I don't want to spend more than I have to.
You can go through the progression of buying crap and then finally figuring out what is good and works beautifully and buying that after one or two years of searching for something that works right... or you can skip the search.
I wouldn't vape a kanger tank if you paid me, I personally find them cheap pieces of #.. but some people like them so ymmv.
If you just want to spend as little as possible then follow @Coastal Cowboy advice... that will work the best for you most likely - although I'd not use a kanger product I'd look into the aspire titan tanks or the tobeco super tanks...
The problem is that most tanks which take factory made replacement atomizers don't make temperature control compatible coils.. more are making some but it's still few and far between so if you don't use an RTA then your exceedingly limited in choices period.
But following Coastal Cowboys advice - I'd get the Pico that accepts 25mm tanks (not all do) - that way you don't have to worry about the size of the tank your buying..