I want to build a gaming pc with a budget of 500 to 635 euros (most likely 500) I have a lap top but it's not the same 
Laptop Specs Dell Inspirion 3537 15,6:
CPU: Core i7 4500U
GPU: Amd Radeon 8500M 2 GB DDR5
RAM: 8 GB DDR3
HDD: 1 TB
I have 3 versions for the specs of my pc build but i cant decide what to buy so i need some help, I have a pc but mu gpu died and it's not that good
Specs current pc:
RAM: 4 gb DDR2
CPU: Amd Athlon 64 x2 5000+ 2.20 Ghz - oc to 2.36 Ghz
RIP GPU: Sapphire hd 5670 1 GB DDR5
PSU: 500w
MOBO: JW-A61PM-D2
MONITOR: Acer 1366x768
HDD: 500 GB
I'm planning to keep the hdd and the psu to save on money
Specs for the new builds are (the RAM, the case and the mobo are the same for all the builds):
RAM: 2 * 4 GB 1866 MHz Kingston CL10 HyperX Fury Black 65.30 euros
CASE: Deepcool Tesseract SW Black 30.31 euros
MOBO: Gigabyte H97-HD3 84.39 euros
V1
CPU: Core i3-4160 107.99 euros
GPU: Gigabyte GeForce GTX960 2GB GDDR5 196.53 euros
MONITOR: Samsung LED 22" S22D300HY Full HD with HDMI and VGA ports 95.70 euros
SSD: Kingston V300 Series 120GB 53.55 euros
V1 + RAM + MOBO + CASE = 633.77 euros
V2
CPU: Core i3-4160 107.99 euros
GPU: Gigabyte GeForce GTX960 G1 Gaming 2GB DDR5 239.34 euros
SSD: Kingston V300 Series 120GB 53.55 euros
V2 + RAM + MOBO + CASE = 580.79 euros
v3
CPU: Core i5-4460 180.17 euros
GPU: Gigabyte GeForce GTX960 G1 Gaming 2GB DDR5 239.34 euros
V3 + RAM + MOBO + CASE = 599.51 euros
I'm not going with a AMD gpu because they require more power so i need a stronger psu and i really can't expend the budget...
So which one should i chose? Should i upgrade the monitor and the storage with the standard gigabyte gtx 960 and the i3 or sould i go with a stronger gpu and with the old monitor or should i go with a quad core i5 and the stronger gpu but without the ssd and the full hd monitor?
I'm planning to use this pc only for gaming and movies (i can work on my laptop) and I really can't decide i don't know if the i3 will perform good compared to the i5 or if the standard 960 be as good as the g1 gaming...
Thanks in advance.

Laptop Specs Dell Inspirion 3537 15,6:
CPU: Core i7 4500U
GPU: Amd Radeon 8500M 2 GB DDR5
RAM: 8 GB DDR3
HDD: 1 TB
I have 3 versions for the specs of my pc build but i cant decide what to buy so i need some help, I have a pc but mu gpu died and it's not that good
Specs current pc:
RAM: 4 gb DDR2
CPU: Amd Athlon 64 x2 5000+ 2.20 Ghz - oc to 2.36 Ghz
RIP GPU: Sapphire hd 5670 1 GB DDR5
PSU: 500w
MOBO: JW-A61PM-D2
MONITOR: Acer 1366x768
HDD: 500 GB
I'm planning to keep the hdd and the psu to save on money
Specs for the new builds are (the RAM, the case and the mobo are the same for all the builds):
RAM: 2 * 4 GB 1866 MHz Kingston CL10 HyperX Fury Black 65.30 euros
CASE: Deepcool Tesseract SW Black 30.31 euros
MOBO: Gigabyte H97-HD3 84.39 euros
V1
CPU: Core i3-4160 107.99 euros
GPU: Gigabyte GeForce GTX960 2GB GDDR5 196.53 euros
MONITOR: Samsung LED 22" S22D300HY Full HD with HDMI and VGA ports 95.70 euros
SSD: Kingston V300 Series 120GB 53.55 euros
V1 + RAM + MOBO + CASE = 633.77 euros
V2
CPU: Core i3-4160 107.99 euros
GPU: Gigabyte GeForce GTX960 G1 Gaming 2GB DDR5 239.34 euros
SSD: Kingston V300 Series 120GB 53.55 euros
V2 + RAM + MOBO + CASE = 580.79 euros
v3
CPU: Core i5-4460 180.17 euros
GPU: Gigabyte GeForce GTX960 G1 Gaming 2GB DDR5 239.34 euros
V3 + RAM + MOBO + CASE = 599.51 euros
I'm not going with a AMD gpu because they require more power so i need a stronger psu and i really can't expend the budget...
So which one should i chose? Should i upgrade the monitor and the storage with the standard gigabyte gtx 960 and the i3 or sould i go with a stronger gpu and with the old monitor or should i go with a quad core i5 and the stronger gpu but without the ssd and the full hd monitor?
I'm planning to use this pc only for gaming and movies (i can work on my laptop) and I really can't decide i don't know if the i3 will perform good compared to the i5 or if the standard 960 be as good as the g1 gaming...
Thanks in advance.