Keywords: at current difficulty rates.
The OP admitted that the rig won't be up and running for another 1.5 weeks, at which point the bitcoin system will already be into the next difficulty. Therefore, none of your numbers apply to anything the OP will see.
Some times I can't tell if people forget about the rising difficulty, or just choose to ignore it because the numbers are so much better if you do. Thanks to the members here who keep pointing this out. Note that most of the projections here that take rising difficulty into account have the OP breaking even at some time in the future (2-3 months), at which point the difficulty will be so high that income will be a trickle. The only profit you're likely to see is from selling your hardware after the fact, but remember that plenty of other people will be eager to unload their ATI cards by then. That's a far cry from all of the claims that mining is 'very profitable' still.
and you always tell people, they shouldn't invest into new rigs,
yet those that do made profit and probably already paid off their new rigs.
very strange that mining for me has always been like "assuming difficulty rises, but price doesnt, it might become non-profitable in about 3months",
it was like that in october, when i bought my first ATI card, it was exactly the same when i bought the second card in december,
it was still the same when i bought 2 other cards in february and again 2 cards about 2-3weeks ago, everytime i had at least 3month in profit assuming the price doesnt rise at all.
and guess what?
today that same (pessimistic) calculation tells me, that mining might become non-profitable around september,
so the risk to take isn't any bigger than it was half a year ago.
but we all know why you tell everyone not to invest in rigs.
