Ok. You already have a Lga1155 motherboard if you have a G630. Look up its model and it'll tell you what Lga1155 cpus it will support, probably any after a bios upgrade. Depending on if it's a B/H or Z board will tell you if you can OC or not. This does not mean you have too. If you get a good deal on a i5-3570k it'll still work just fine in a B/H board, no OC. For best playability you'll want a 4 core cpu, either i5, i7 or Xeon v2, preferably above 3.0 GHz.
This will save you money as a cpu alone is cheaper than buying a motherboard and cpu new.
I've looked at your lists of possible psus and they are bad. As in the psu choices are miserable, but the psus themselves are some of the worst units available. I found a psu that's very good, not that expensive and will power any nvidia in the 750ti or 900-1000 series but not the high end 700 series like a 780ti
http://www.lazada.com.ph/seasonic-g-550-80plus-gold-203034.html
You could also look for something like this.
https://m.olx.ph/ad/110035352/intel-core-i7-3770k-3rd-gen-socket-1155/90c99c8c38