Correct me if I'm wrong buy my understanding is that you want to mine to make money. Unfortunately you will be disappointed.
Btcmining is like goldmining. The first few people to do it made a killing but after the gold rush was in full effect it became profitable to almost nobody. And similar to gold mining today, without the most efficient, industrial operations, it is very hard to turn a profit.
All ROI calculators are trash but bitcoinx is especially shitty. Use bitcoinwisdom or btcinvest for a slightly more reasonable guestimation. My estimations show that an sp30 delivered in august will earn about $3800 back in 6 months.(no ROI)
Also never preorder hardware. Time and time again it has proven to be very high risk with nearly no reward if you do manage to turn a profit.
If you insist on mining asap I would recommend any usb miner or even an rbox to get started and familiarized with mining.
After you've been mining for a month or two and fully understand how unprofitable it is, then and only then should you consider spending a more serious amount of money on hardware.
Btcinvest calculator did in fact show a better break down and almost absolutely no ROI. I appreciate your advice and it did share some light into the topic. I should have noted that I have a pretty good job, I was just looking at doing something on the side. Again thank you everyone for the advice.
Mining is just one way to acquire BTC. Ultimately you should decide what is the fastest and cheapest way for your to acquire BTC. Mining has a fun factor associated with it, but if you like your job you could try to offer your services for BTC.