It's official, I'm no longer a KNC customer in waiting. My final refund arrived today. Well, the good thing about it all is I basically just got paid $30,000 for the 31BTC I sold back then.
So, recommendations. Antminer S2 or Spoondoodilies?
Mining at home or Colo? Well, actually, unless density is hugely important I'd go with the S2, but only after seeing some end-user reviews.
I like the Spoondidler, but it's loud, pricing is prohibitive, and there's a pretty sizeable delay between order and receive. It's a really nice looking piece of HW though.
I rent DC space $50/mo per 45U rack plus power, so 30 spoondoodilies in 1 rack is only $100/mo cheaper than 3 racks of 10 S2's
IMHO putting 30 Spooners in one rack is a non-starter.
Because of the heat density you would have to spread them amongst racks.
Most ordinary racks can not dissipate more than about 10KW with the doors closed without some serious (i.e. expensive) cooling solurtion (water cooling, sealed hot/cold aisle, high volume air flow, etc.).
Also, most data centres are not designed to handle that kind of spot heat output (I worked in data centres for 36 years).
Sorry, big generalisation here as I do not know your precise circumstances, but when I watched their video when they said you could put 30 in one rack I split my sides laughing.