Larry, be sure to check ebag for refurbished ones. They pop up ever so often. That's what I grab if we have the time to wait for one to come up. And the black center ones are the way to go in areas like yours and ours where it gets hot and have alcohol in the fuel.

I have never tried the 625. All I have ever ran are the 750s because I have only put them on 360s and 440s. The only difference between the carbs are the primaries.