"And the consecutive stay is 60 days , so I have to leave China 60 days, and re-enter for this to be valid." - not sure what your point is here. This is unrelated with where you apply. You can get 90 days if you justify it.
And about the 10-year visa, the price is the same so you may as well go for it as you never know: http://www.visaforchina.org/YVR_EN/yyxz/266546.shtml