Hey Mark,
Thanks for the confirmation. I actually came to the same conclusion myself with my own lab last night & today.
As of right now I have a new server that'll be my SSO & Inventory Services server. I have the SSO DB already built and SSO and Inventory Services installed and ready to go. Just waiting for the scheduled downtime now to go to 5.1-U1 this weekend. 
Anyone have any thoughts on the specs for this new SSO/Inventory server? VM has plenty of "min" specs on a separate SSO server and a separate Inventory server; but, truth is, I have a big environment with almost 400 hosts and 6400 guests. So JVM Heap Size is telling me 12GB-- which to me sounds like a VM at least 12GB in memory plus a gig for OS and a gig for SSO... which should translate to a 2vcpu & 14gb ram VM.
Thoughts?