Question should i buy fire pro v7900 or v8700 or buy quadro 5000

[Fady99525new]

i have a workstation dell t7500

os: win7 64bit

cpu: (dual cpu) xeon e5540

gpu:quadro fx580

ram:16gb ddr3

hard disk:hdd 100gb

.................................

if you have any other suggestions help me

 

[RememberThe5th]

For what use?
PSU?

 

[Fady99525new]

i have dual xeon e5540 with 8 cores

 

[Fady99525new]

it is 1100w