I use iRedMail and have been for 3 years now and I love it. It's really just a collection of scripts and updates are just updates to the underlying packages. Everything is transparent if you want to know what's going on. It takes awhile to get used to all the moving pieces (if you care to even know them as it isn't necessary) but I've found their setup to work very smoothly and be very stable.

I'm also a developer, btw. This mail server is only for me so it's not a big deal but if I had to I'd probably be comfortable setting it up for a small business. I wouldn't recommend it for that still, though, since you are the support in that case.