Recommend Robust PDM Pro Servers

My company is growing and we are anticipate adding about 15 engineers within the next 3 months.

We want to setup a robust server running PDM pro and I am looking for recommendations on servers.

Assume budget around \$3,500 - \$7,000

Please provide links to any server you would recommend purchasing and using.

Thanks

SolidworksSolidworks Pdm enterprise Pdm