Recommend Graphics Cards for VDI with Server2012/HyperV & RemoteFX ?

Hi All , one for the community ??

We looking to extend our current Live service ( vWorkspace with VMWare ) and deploy vWorkspace / VDI desktops on HyperV

We have some well spec server : HP Servers DL360 Gen8 / 7

We like to use HyperV on Server2012 and deploy "VDI with RemoteFX" ( hardware ) - i'm aware in Server2012 you can now use Software to deliver the RemoteFX feature

Has anyone done this ? and could the recommend any particular Graphics cards - spec up and suppored for Server2012,HyperV,RemoteFX

eg . NVidia TESLA GPU or AMD FirePro S9000  ...

thanks

prit