which psu should i get?

Question

i asked this question earlier but somebody pointed something out to me earlier
so this is slightly altered

ill be running
a gigabyte 990fxa-ud3
fx 8320 OC @ 4.00GHZ
8 GB of crucial ballistix @1866MHZ will be putting more in in the future
GTX 770
how many watts?
any suggestions?
What do you think of these? - http://www.ebuyer.com/584214-corsair-cs550m-modular-550w-atx-psu-cp-9020076-uk

http://www.ebuyer.com/546619-cooler-master-g-series-g600w-80plus-bronze-psu-rs600-acaab1-uk

http://www.cclonline.com/product/109424/CP-9020060-UK/Power-Supplies/Corsair-CX600M-Builder-Series-600-Watt-ATX-Modular-Power-Supply-Unit-/PSU0533/

http://www.cclonline.com/product/102197/FD-PSU-IN2B-750W/Power-Supplies/Fractal-Design-Integra-R2-750W-80-Plus-Efficiency-Power-Supply-Unit/PSU0514/

http://www.pixmania.co.uk/pc-tower-supply/cooler-master-cooler-master-gm-series-power-supply-internal-atx12v-2-31-80-plus-bronze-ac-100-240-v-650-watt-active-pfc-europe/21812101-a.html

im wanting modular if possible because of the size in my case and prferably not to much money.

thanks in advance

Answer 1

The second is better.

Answer 2

Definitely go for the Corsair 600 w

Answer 3

I only use corsair Power supply's so my advice is the corsair PSU