I hope this is in the right place.

We are currently investigating replacing Exchange 2003, and have come across Zimbra over the weekend.

I was considering downloading the trial version of Network Edition Server as this is the route we would go down but for the trial period it would be run in a virtual enviroment (vmware player).

But my thought is will this hamper the expierence (give a false impression of lack of speed), so my question is would I be better have a first look at the trial of Zimbra Appliance or is look/feel/operation completly different.