T.L.
There is a store called Be By Baby in the city that sells different baby carriers as well as teaches classes on different carriers. There is also a free Babywearing group that meets there called Cityslingers who would have so many different carriers to try on. Also I would highly recommend Thebabywearer.com for more help. I myself have a Babyhawk meitai and didnt find the ergo nearly as comfortable, but problem is everyone is different and some find the ergo so comfortable! If you have been using the bjorn without complaints you could probably use anything because that is just about the most uncomfortable carrier that there is. There are other groups in the suburbs too, not sure where you live