Right now I can spend $6750 for 1000 DRK to setup a masternode.  Earnings per day would be: 1.019 DRK = $6.912

I can also spend $6750 for 5870 XC.  Earnings per day from POS would be: 0.54 XC = $0.616



Source of masternode info:
http://drk.poolhash.org/darksend.html