Recommendations for a good but cheap micro niche site supplier.

I'm looking around the marketplace for a micro niche site spiller as I need about 50 (not all at once). But everyone seems to be getting spun articles, waiting weeks, or articles that are not written in good English. I'd rather keep the costs down as I need so many, and a fast turnaround (less than a week) is needed.

Does anyone have any recommendations at the moment?