I'm with fmw, the Zeiss optics will be the best reason to go with Sony. On the other hand, people say the same thing about Leica. So a guy saves his pennies for months and months to get a Leica body & lens, only to find out it will take him the rest of his life to get the lenses he wants/needs.
I've also had bad experience with the (cheaper) Sony products. One has to realize that Sony doesn't design all of their stuff, like they used to in their heyday of the 1960s through 1980s. They outsource the design of stuff that is so cheap to make that they don't want to waste their own highly-paid engineers.
Back in the day, the Sony name was synonmous to quality. But remember that Sony stuff wasn't inexpensive then either. It was a high-end brand; they didn't make any cheap stuff. Now, they put their name on cheap stuff, and their reputation is suffering, even though their high-end stuff is still the cream of the crop. (high-end home audio, pro audio & video, for instance) It's usually not consumer grade stuff.
Reliability-wise, I've found Panasonic to be better across the board.
I don't know if that Maxxum flash mount is a pro or a con.