Looking for a New GFX

[Amusement]

Okey, so i don't really keep upto date with the latest shizzle anymore & am looking to buy a new GFX, can someone here help me out with this?

At the moment i got a Crosshair IV Motherboard
ASUS Crosshair IV Formula Republic of Gamers - motherboard - ATX - Socket AM3 - AMD 890FX - Socket AM3
Am not willing to update the motherboard at all, that thing is staying, the powersupply i have currently is only a 450 watt, this will need to be upgraded that much i know & am willing to replace that aswell.
I mostly need to know which GFX will work on my motherboard as i know it's old.

I've been looking through Amazon & i found these.

Sapphire Radeon HD7770 OC Graphics Card (1GB, GDDR5): Amazon.co.uk: Computers & Accessories
XFX AMD Radeon HD6870 Graphics Card PCI-e 2 GB GDDR5 Memory 2x DVI HDMI): Amazon.co.uk: Computers & Accessories
XFX ATI Radeon HD 6790 HD-679X-ZRFC Graphics Card 1 GB PCI-e GDDR5 Memory 2x DVI HDMI 1 GPU: Amazon.co.uk: Computers & Accessories
XFX ATI Radeon HD 6870 HD-687A-ZHFC Graphics Card 1 GB PCI-e GDDR5 Memory DVI HDMI 1 GPU: Amazon.co.uk: Computers & Accessories
EVGA GeForce GTX 650 2GB GDDR5 Graphics Card: Amazon.co.uk: Computers & Accessories
EVGA GeForce GT 640 Graphics Card (2GB, PCI Express, DVI-I, DVI-D, Mini-HDMI): Amazon.co.uk: Computers & Accessories

You guys any idea what the best one for me would be & also what the difference betweem the normal one is & the mini one.
If you need any more information just ask,
Thanks.

Edit: Oh GFX Spending limit is like 130GBP total~ because i need the rest to pay for a Powersupply afterwards.
Any of those should be able to run current generation games, as i play everything currently (Yes, normally on Low or Normal) on an 8600GT so ^.^

 

[Resource]

This one..

EVGA GeForce GTX 650 2GB GDDR5 Graphics Card: Amazon.co.uk: Computers & Accessories

 

[Amusement]

Thanks, I basically just selected the cheapest from the list because it's black friday shizzle be cheap.