Best graphic card for £100?

[iDuffin]

So whats the best graphics card for £100 for PCIe x16
My specs

Motherboard: asus p8h61-mx
Processor: intel celron G530 clocked @ 2.4GHz
Ram: Rip Jaw 6GB 240PiN DDR3 @ 1337
Graphcs: intel graphic 2000
Hardrive: western digtal cavitar blue 500GB, samsung spinpoint 1TB 7200RPM
PSU: 300W

( i know i will have to upgrade the PSU as its to weak to run a good graphics card)!

Also i need one that supports 2 monitors not fussed about the input

 

[iDuffin]

Thanks gregster! Will look at some reviews now

 

[iDuffin]

wow so many to choose from and yeah i suppose i could strech a extra £20