Hi brazenhead,
from my point of view the jewel of the UCM applictions is COM.
It safes you a lot of time in yor daily work, you can do mass configuration and scheduled backups with it.
We installed a free trial and all of our staff that works with Avaya switches used it after one week as the primary configuration tool.
If you are familar with ESM you will find the same solution now web based with some addons.
I did also investigation on 3 other UCM application.
Visualization Performance and Fault Manager
Looks OK, but I stick with Nagios / Shinken for monitoring.
Virtualization Provisioning Service
VPS integrates your COM with your ESX vSpehere management. It will basicly configure your Uplinks to your ESX Cluster automtically.
In fact the SwitchUplinks aren΄t configured (you have to do taht task manually) by the VPS, it will really helps you when your DataCenter is running SPB.
In combination with SPB and VPS you can create networks on your VM ESX and the network will be configured automated by VPS.
IP Flow Manager
It is a good Flow analytics tool. But it only supports IPFIX and Netflow 5/9 when you have Flows in other formats you have to use an other Flow Analytics tool.
On the following page you can get free trial versions of the most UCM applicaions, and video overviews to the different products:
http://www.avaya.com/usa/product/avaya-data-solutions-managementCheers