A few questions about cpu/gpu on first build [solved]

Jezza1

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Jan 30, 2015
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Now for a few questions:
- I can't see the utility in upgrading the cpu to an i7 for someone in my position, but is there a noticeable difference between the i5 4670k and 4690k?
- In terms of the video card, is the 2gb GTX 770 as awesome as I've read, or would I be better off replacing this with something in the 3-4gb range, say the r9 280x?
- IMPORTANT: Using the cooler I've selected (Cooler master hyper 212 evo), can anybody with any experience regarding this tell me whether or not this, along with the corsair vengeance memory listed, fit onto the gigabyte z97x-sli without blocking ram slots (in terms of physical size)?