I am looking into upgrading my Multi Use comp (Gaming/Mining) and decided to do a hardware analysis based on initial cost and theoretical gain/cost to operate to get the number of days to break even. I could use some suggestions as I am sure some of my data is skewed as far as power usage values go, but I am pretty confident in my MHash and card pricing. I also included an efficiency hit for multi card setups as I figure the additional heat would lead to additional power draw and down time. Anyway feel free to flame or criticize away that is why I am posting this, also if anyone would like to see more cards added I would be happy to add them.

https://docs.google.com/spreadsheet/ccc?key=0Arn_-Vkd5J2kdFRPUGFSOC1jTU9rR1FabUhmTEpxenc