@soothaa ..... I doubt I have enough power in my current farm to get 40 plus rigs, since I gave up 50% of my farm space.
Aha that makes sense. Yeah I'll be cutting any RX570's/Vegas as I increase my 5700XT stack. Up to.. 20 I think. They're amazing cards.
I would have gone whole hog and bought 50-100, but I'm under contract for another rental building atm and can't be running a card up without getting an earful from my bank!

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I'm in a similar boat, although with 470's not 570's lol. So far i just received 2 5700's and 1 5700XT and constantly hunting more if i can find decent deals. You specifically mention the XT's... do you see a noticeable difference between them and the non-XT 5700s? I have read many places there is not much difference mining wise but looking to confirm that. My current mindset is buying 5700's if i can find them under $350 and the XT's around $375. Obviously, the XT's will probably fetch a bit more for eventual re-selling, but other than that, are there any notable upsides for mining that would warrant that price premium?