I prefer the Manduca to the Ergo, but thats personal preference.

Never risk Ebay as thats where most of the fakes come from, even if the photos are the proper Ergo ones, what you get in the mail may well not be.

Babes in Arms are the Official AU distributor for Ergo and its them that will be at the Expo, so you are guaranteed real from them. They will be able to take you through the different versions.