Open Stack

All,

I am planning to build Openstack Private cloud for my company. We have bunch of Dell blade servers but very old - so probably investing on resources on it is not good idea.

I am looking for acquiring new Server with high amount of CPU and Memory resources. Can anyone suggest the best suited server brand and model for Openstack deployment (Basically for Openstack compute node)? We are looking for building infrastructure for minimum of ~100 VM's can run concurrently with 1-4 GB of RAM allocation. 

It would be great help if you can provide suitable server brand and model & with reason.

Appreciate and Thanks in advance!!!!

JK