Hey Guys!

I'm back in the mining biz. Have been Hodling my bitcoin and now I have got the itch to start mining again.
Looks like monero will be my target.

I am at that stage where i'm trying to learn as much as I can as fast as I can and my head is spinning. I am hoping someone could help direct my focus.

located in Canada
cost per KWH: aprrox 6.5 cents per kw hour (US)
Goal: build a GPU mining rig

I have ordered a couple of Nvidia GTX 1060's 4GB just to stick in a couple of computers i have lying around, just to play around with different configs. My expectation for this card is to get about 525 H/S for about 50w once optimized.

Before I go out an buy 6 or 8 cards for a rig i wanted to get familiar and find the best card in terms of speed and energy efficiency and purchase price.

Now that i have already ordered the 1060's I stumbled upon some RX580's , cost a bit more to buy, more to run, but seem to put out more hashes. Once configured and maybe bios modded, what do you think the RX580 will do? 890 MH/s at 95 watts?

Seeing as my hydro costs are fairly low, perhaps I should be looking at AMD?

one more question, resale value? Should i be concerned? What about moded firmaware, can that be restored to stock before i sell the AMD? I have heard the Nvidia do better on resale? True? or nothing really to worry about?

The PSU I ordered is  EVGA SuperNOVA 850 https://www.newegg.ca/Product/Product.aspx?Item=N82E16817438092


If AMD is the way to go,I can always return the Nvidias 1060's i have coming or stick them in some other pcs I have lying around.

So ideally, what would you suggest for the rig? 6 AMD rx580s'  or like 8 Nvidia 1060's . What would be the best way to max out that power supply? Any good motherboard suggestions would be appreciated!