It obviously boils down to "good enough" and "free enough" but I've planned on moving back to Postfix/Dovecot at home for the reasons outlined, just a time thing.
I've been thinking of doing this myself as I've heard great things about Dovecot. An ideal setup for me would be a VM hosted somewhere in the cloud (presumably my hosted VM can't be warrently searched in the same way as email), running a barebones Arch+Postfix/Dovecot. The only inhibitors are cost of hosting and time of setup, if anyone has information on either good hosting solutions or setup information I think it would be a useful addition to this thread.
Running out of the home may be seem a bit asinine but the home is still somewhat sacred with respect to search warrants in the US and moving email around is insanely fast if you work out of the home.
Of course you'll likely need a business class connection with static IP and configurable rDNS and no port 25 block so not everyone will be lucky enough to be able to do it. But something like a plug computer will keep the cost pretty reasonable if you don't currently have a home server and for me it's cheaper than a VPS + consumer cable connection.
