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Thanks William, nice to hear advice from some one who has been using the plugin. I'll go ahead and use the apache module to keep the server usage low.

Thanks for the advice, I am leaning to towards the redirects as well. I've heard these discussions as well. We're not expecting the keyword loaded domains to increase in rankings because of their name. It's that they are currently sitting in position 1 in google and we don't want to loose this.