Which upgrade for 500 EUROs? Excluding GPU+RAM

[burbee]

So I am kind of finalizing my decisions on upgrading my pc.

I will be buying: CPU, MOBO, PSU and a HDD I already found for 40-50 Euros.

Excluding RAM from budget.
Have a GTX660 (ASUS Top)

Notes: I want to be able to overclock the cpu at around 4.5 GHz stable, and mobo should be durable. Uses for gaming when I got free time and for my study. I'm an IT student for 'Technical Computing' first year. I want it to last as long as possible..

*Yes I have an aftermarket cooler, Hyper 212 EVO.

And my thoughts were like:

CPU: i5 3570K - 200 euro
MOBO: Gigabyte GA-Z77X-D3H - 120 euro link
PSU: Corsair Enthusiast TX650 Modular - 90 euro
Possible HDD: Hitachi/Seagate 500GB - 50 euro
RAM: Corsair Vengeance LP 1600 2x4GB 1.5V OR G.Skill Sniper 1600 2x4GB 1.5V - Not in budget, just need suggestions! Same price.
(Case: Corsair Carbide 300R)

OR

i7 build with lesser motherboard..

CPU: i7 3770k - 300 euro
MOBO: Something like Gigabyte GA-Z77P-D3 or GA-Z77M-D3H Micro ATX mobo - 78 / 81 euro, link 1, link 2
PSU: Corsair Enthusiast TX 650Watt Modular - 90 euro
Possible HDD: Hitachi/Seagate 500GB - 50 euro
RAM: Corsair Vengeance LP 1600 2x4GB 1.5V OR G.Skill Sniper 1600 2x4GB 1.5V - Not in budget, just need suggestions! Same price.
(Case: Corsair Carbide 300R)

So this build will be a little bit over the budget but that's as far as it gets.. So it's like 20 euros out of range..

All suggestions are welcome! I'm aiming for performance/price over time..

Or should I go with AMD because of 1155 is a dead socket?

 

[burbee]

will you be doing anything that takes advantage of HT?

I don't know that at this moment.. Now I won't but maybe in the future? I will be doing programming mostly I think. But I don't really know what is to come in the next 4-5 years for me..

I assume lots of programs and perhaps games will make use of more cores? But if you guys think I will be fine with an i5 then it will be i5..

At the moment I'm not a heavy multitasker whatsoever. I have a very old Phenom X4 @ 2.6GHz..