That's why I think it would be good to get the money in so that we can jump on them as soon as the next gen comes out
I don't see how this makes sense. The "next gen" miner could be a "Louder than S5, 1500W, 220V only, $950" device delivered in October that won't fit half the people that contribute early.
Sorry to be "Debbie Downer" but throwing money into a Group Buy of a non-existent Antminer device makes NO sense to me.
I would call you a 'common-sense Charlie'
I am not knocking buying gear that is old.
A s-5 for 300 usd costing 9 cents a kwatt would be a very good deal. So getting s-5's might be good if the price is correct.
I'm not fully up to speed with the Bitmain chatter about their next step. They usually announce it just a bit beforehand to take in orders while producing them.
Knowing their speed of bringing out models one wouldn't want to buy just before the lowering of price of the current model and the announcement of the newest one.
But yes, at 300 USD and 9 cents a kwh, you will be ok for a while
Diff hasn't moved a lot since January