PBX aka "Press 1 for sales..."

[Jason Barnett]

We're thinking about getting a PBX system to route phone calls for our company. You all have encountered something like this... they have some kind of welcome and then "press 1 for rentals, 2 for maintenance, ..." I've read a little bit online about asterisk and Telrex, but I'd like to hear about other folks' experience before I jump in.

We would want a system with these features:
- It needs to record all phone calls that get routed to our sales department
- It needs to have voicemail
- It needs to be able to forward calls to an outside number (i.e. a cell phone)
- We would like caller ID capabilities
- We would also like it if we could get a hosted service solution rather than us trying to set up and manage a server.

The more I think about this the more I'm convinced that I want a PBX system. Obviously part of the reason is because we have different guys handle different responsibilities and we want to route the calls efficiently. However, we are also concerned about legal obligations (fair housing laws, etc.) and it would be awesome to have our prospective tenant calls recorded.

Does anyone do anything like this? What are your experiences?