Re: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs
but looks liek I have ot settle for some Antminer S7's instead. 
No, you don't have to settle for an S7. Do the math. You are unlikely to ROI before the block halving. Better off buying BTC and hodling while it's 1BTC < $250 USD, IMO.+1
Bitmain and some customers calculate ROI with suggestion the difficulty will not change
https://bitcoinwisdom.com/bitcoin/difficulty