I totally agree with Curt.
Offcoure i have seen lot many issues related to the performance and many ppl migrated from virtual machine to the new H/W.
But my suggestion would be it would be good if u look for a good Hardware rather than using of the same like the VPC.
As in general if u use the same H/W Configuration i guess you could achieve hardle ~10% increase in performance.
My suggestion is go for a good H/W Configuration and also see that if u use a seperate server of SRS that would really make ur CRM run faster.
I have implemented the same manytimes and i found it to be excellent doing this way.
Thanks.