http://www.spondoolies-tech.com/products/sp30-yukon-september-batch-1 @ just over $5000 this really is quite a crap deal  when you can get 12 S3's  now without the wait for just over $5500. Just under double the power to power the S3's but between now and September the diff increase will soon sort out that benefit that the SP30 has. Plus I would guess by September the price on the S3 will be down as low as 0.5BTC.

Bitmain still are by far the best out their for price, even though ROI is highly unlikely for those who don't resell their rigs frequently.

(Or if your like me and have a free scheme offering solar panels for free, the supplier just keeps any excess energy produced and sells it back to the grid - No excess energy in this house )