Hi,
we are also using B200 M3 Blades. Running ESXi 5.5
They are on the compatibility list. If so, all Hardware is also compatible with the ESXi Version.
Install the Servers with the Cisco VMware Image and you will be fine.
But check the installed Cisco Image for compatibility with VMware. For that, you have to go to the Cisco site
Cisco Unified Computing System - Technical References - Cisco
and check your installed version with the vmware version you wan´t to use. For ESXi Version 5.5 you need at least Verion 2.1(3) for UCS
Frank