AMD tends to be cheaper when it comes to CPUs.
I agree with completelyrandomname. For RAM, get 1600 or 1866 Mhz. 1600 Mhz is plenty fast, 1866 Mhz if you found a really good deal. You would have to have a very expensive motherboard and CPU to really benefit from 2133 Mhz RAM... and have serious overclocking plans. 850 watt PSU is a lot more then you need, especially with a GTX 650 Ti Boost. 550 Watts would be enough, 650 Watts would give you some growing room. Rosewill is an ok brand. That's Newegg's house brand. I prefer Antec, Corsair, and Seasonic PSUs. You don't Need a full tower. A mid tower would have plenty of room for your build. Case's tend to be personal preference more then anything. I really like Cooler Master cases.