Best GPU for ProLiant DL380 G5 and ProLiant DL580 G5

[Sainyam]

Hello,

I have 2 ProLiant DL380 G5 and 1 ProLiant DL380 G5, I wanted to configure Remote FX on Windows Server 2008 R2. I wanted to know the best 5 latest GPU that supports these two units. Which can be well integrated with Windows Server 2008 R2 SP1

I had gone through with this URL http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02478570/c02478570.pdf 

But this mentioned the all 1 years old GPUs. 

Thanks in advance