goodroi - 3:52 pm on Dec 2, 2010 (gmt 0)
If you honestly feel that you can add enough value to the 200k pages of duplicate content that you will then pass google's current and future algorithm, then go for it.
Please reread my comments. I did not say you should not do it. I simply suggested running a small test version to prove your concept. If you are confident in your idea and ability then go forth and good luck.