What is the world's most profitable ASIC miner?
I'm not looking for Bitcoin miner, I'm looking for others such as Litecoin, Dash, etc..
Of those that are in the field RIGHT NOW, probably the Bitmain L3+ on Scrypt - but they're sold out MONTHS ahead, I think the next batch to ship is schedualed for September and it's ALREADY sold out (they're currently shipping their "July" batch that was sold out months ago).
Of those that have been ANNOUNCED but are not yet shipping, presuming they meet specs fairly closely and actually show up when they are supposed to, the Innosilicon A5 (30 Gh/s+ X11) looks likely to become the most profitable at least for a short while with the Bitmain D3 (15 Gh/s X11) probably ending up as #2, but I suspect the D3 will cost a fair bit less than the Innosilicon A5 (D3 price has been announced as $2699 but is not available for preorder right at the moment, A5 price has not been announced yet).
(EDIT) A5 price is $9999 - IMO this gives the D3 a pretty good chance of achieving 100% ROI well before an A5 unit can, but if the A5 meets specs it MIGHT pay off more in the long run due to higher efficiency.
Both of those are not shipping for months, and with the new IBelink also in the mix, X11 profitability is going to get HAMMERED once any of these new BIG units starts shipping.
I suspect the Baikal miners will stay profitable for quite a while, as they're semi-close on efficiency to what the D3 announced and not WAY far behind the A5, but it's going to come down to how much new hashrate gets added and how fast and soon - and what DASH price is going to do in the meantime.
Keep in mind that most Scrypt ASIC are still profitable as Bitmain hasn't been able to ship enough L3+ units to keep up on hashrate vs Litecoin price rise over the last 3+ months - this MIGHT happen with X11/DASH as well for a while.