[Lucaz]

The pc I'm writing this with is terribly old and now dying. Thinking about replacing, this is what I've got so far (prices on dollars/local currency):

*i7 3770 ($530/3200), 4770 ($560/3400) or i5 2500 ($330/2000). The price difference is quite steep, I don't really know how much is the difference in performance. Also I don't know the difference between standard and k versions.
*GTX 650 ti boost ($330/2000) or GTX 760 ($500/3000), either one with 2gb gddr5. I'm unsure if the price difference is justified considering noone here cares that much about graphics as long as games run at 30 fps with a good resolution and okay detail. I could go for an ATI in same price range if it's better I guess, but I'm completely lost in regards to those. I'm also kinda confused by seeing the same card by different manufacturers at different prices.
*I'm unsure on whether 8 or 16 gb of ram
*I don't know absolutely anything about mobos. Seems like Z77 ($210/1250) and Z87($230/1400) are the way to go, but dunno about the variations and chipset.
*If there's something to know about PSU and cases, besides making sure they are adequate for the mobo, I don't know that either. I guess I'd like to keep the noise down whithin a nice price.

[Lucaz]

On the mobo, are cheaper ones like P8Z77-m, Pro3 and d3h good or should I go for more expensive ones like Extreme 4 and Sabertooth? I name those because they are the most readily available around here.