Just found about
http://www.rigwarz.com/ My only know-how comes from the forum, but it seems that I found an
unbiased opinion about the SP30. It seems that it's doing very good besides all the trolls whining. Only 2 days ROI difference between S3 and SP30. Makes me feel warm and fuzzy inside.
Edit: Well if you add the 12 PSU cost I think that the SP30 might achieve ROI just a little faster than the S3s. Math is nice! Crypto is uber!
Sorry, but that site is significantly flawed. For instance, it claims "* Prices do not include shipping or tax.", yet the S3 price does include shipping. Furthermore, "** ROI calcs assume static conditions for ranking purposes only." It's impossible to compare miners with static conditions fairly.