@tupsu: look at my math, i did a cost basis at 3.4th (as that means better shipping$/gh) and then adjusted the 4th pricing of c1 miners to be based on 3.5th (similar to 7*s3+ units)
The resulting price was very similar for all 3 options.

@bickelliski: the c1 b2 comes with the cooling kit now. All that you need different from the sp20 is some cooling fluid and a bigger space to set up units and radiators. That's $5-20 depending whether using distilled water or a specialized coolant

S3+: takes up most space, reasonably quiet
C1: takes up medium amount of space, cooling system is easily reusable on a computer or the next gen c2, similar noise to s3 (due to fan on unit and fans in rad), some issues with pump leaks or failures.
Sp20: smallest, best software (debatable of course), better price, loudest option.

Imo, the sp20 is a tempting offer in comparison, but the noise and low buying power of. A bitcoin right now are holding me back. Anyone managed to sub in quieter fans to make this acceptable for living in the same floor of a house with?

Ps: the s5 is total rumor outside of a random magazine advert. I think there will be one soon, but the nov15 date is unsubstantiated by bitmain (outside of a random magazine advert)