Cisco has released a Cisco Validated Design (CVD) covering FlexPod Datacenter for 2000 Seats of Citrix XenDesktop 7.1 on VMware vSphere 5.1 including technologies XenDesktop 7.1, Cisco UCS Blade Servers, Cisco UCS unified fabric, as well as NetApp Clustered Data ONTAP 8.2.  See below for link!

http://www.cisco.com/c/dam/en/us/td/docs/unified_computing/ucs/UCS_CVDs/cisco_ucs_xd7esxi51_flexpod.pdf

-Jonathan Vota, Lead Systems Engineer, Americas Emerging Product Sales