Thanks for the feedback!
Regarding Hashrates, as i use 1060's and know first hand what they can do - i have put in its "tweaked" hashrate. but as for the others, as i have to assume a newcomer may stumble across this and not know/understand how to squeeze extra out of the card - i thought it best to play it safe with the "out of the box" hashrates.
With regards to cost per Mh/s - i know what you are saying and i would love to do that but the combination of different board/cpu and ram combinations are just so many and cost differences even more varied, i would not be able to cover them all. this is purely for the selection of the GPU's.
Appreciate the comments!
cheers,
Skully