Re: A4 Dominator - Pre-Order Group Buy - 280mh, roughly 1000w, $1800 + shipping
......i have ROI'd AGAIN on my A2's in the time this BS has been going on ;p course once you guys GET your A4, you should catch up quickly 
A little sarcasm? If LTC was at $4 today and you turned the machine on, you would likely not ROI until July 2017 (LTC baseline). That assumes the same stability of difficulty we've enjoyed for the last year. With a flood of new A4s, difficulty will jump up across all coins so it'll be interesting. I'm assuming the base unit is $1800, $150 shipping, and $200 for a EVGA 1300 PSU with power at $0.10 with an average difficulty increase of 0.1%. I would call this the BEST case scenario.
http://www.vnbitcoin.org/detailcalculationltc.php?name=LiteCoin_Mining_Rig&startdate=2016-09-20&costperunit=2150&wattperhour=1000&gigahazarate=280000&daytoincrease=3&testlopfirst=1&diffincrement=0.1&bitcoinperdollar=4&electriccostinput=.1&begindifflevel=54344
Guys, the basic ROI calculation used by these online calculators is very shortsighted way of looking at this. If you were buying machinery for a factory, you'd typically be spreading the cost over a number of years. Also you're forgetting the residual value. After 2 years I sold my A2 mini's for more than 50% of what I paid for them :-). So try your ROI using the cost minus a reasonable residual.
Then, forget about LTC as the way to generate income. If you look at poolpicker.eu you'll see that Nicehash and LTCRabbit have been paying out an average of 0.000075 BTC/MHS per day for the last 60 days (I track it), and Zpool has been paying out 0.00009 BTC/MHS over the same time. With BTC at $600, that's $12.60 and $15.12 per day respectively.
Now if you take the $2150 and use a conservative 1 yr residual of 50% (value if sold after 1 year) your ROI is (50% x 2150)/12.60 = 85 days, or (50% x 2150)/$15.12 = 71 days if you mine on Zpool.
As for the shipping, Inno said 'starts August with max delay of 1 month'. We're still in that 1 month delay period so they haven't defaulted yet, but I'm also very disappointed in the lack of communication from them.