When you say power consumption is not a factor do you mean the cost for usage, total capacity available to you, or both? If both then I would recommend going with the most reliable miner you can find and everyone including myself swear by the S3 as being an absolute beast. Only issue if you have unlimited supply and electricity is free to you will be the cost of power supplies to run the S3. Which again comes back to power..... So what do you mean by power is not an issue? If you're like 95% of the people who ask this question who are renting an apartment with electricity included you can find plenty of summaries of why this is most likely not going to work for very long.