Mark,
I say Zoli Z-gun. Only because I currently own one and have been thoroughly been impressed with it. I shoot it alot and have had not any problems whatsoever. Its built like a tank (very similar to a Perazzi and other similar types), the fit and finish is overall extremely good, excellent barrels, and its balanced nicely. Also has a drop out trigger group which makes things nice if something was to happen to the lockwork (doubt it will, though), and prices on used Z-guns seem to be pretty fair...prices on the newer Z-guns seem to continue to climb.
Next choice would be a Beretta 686 series. Hard to go wrong with this old workhorse, proven reputation.

Dustin