graphics card recommendation

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Hi
I am looking to give a shot at upgrading my good old Lenovo H215 rather than buying a $2000 workstation for now. H215 specs can be found here
http://reviews.cnet.com/desktops/lenovo-h215-0893-athlon/4507-3118_7-34150821.html

I just bought a crosair HX 750 w PSU and I am looking for the best graphics card that is compatible with my system. My main thing is;
I need to have the graphics card support at least 3 monitors.
I also think staying with AMD is a good idea as it is my cpu.

I appreciate your help. I have run Everest on my motherborad and can provide that info if that helps but I hope the cnet link above is sufficient.

 

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The bet card for your setup is the AMD Firepro W5000 http://www.amazon.com/gp/product/B0093HV5AK/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0093HV5AK&linkCode=as2&tag=b0b929-20

Would AMD Firepro W600 work for me? I am concerned that it says that 75W should be dedicated to the PCI slot which I do not fully understand. They are also not saying if this is 1/2 length card as per link http://www.amd.com/us/products/workstation/graphics/firepro-display-wall/w600/Pages/w600.aspx

I am also considering the Firepro 2460 http://www.amd.com/us/products/workstation/graphics/ati-firemv-2d/2460-mv/Pages/2460-firemv.aspx can you confirm that this works if W600 does not?

Much appreciated