Hi Davkul & welcome to TFL. To each their own when it comes to guns but here's my 2 cents.
I like the M&P a lot, I think I like the CZ a bit better. I definitely prefer DA/SA over DAO. I like hammers better than strikers (though both are reliable) and I prefer metal frames over poly ones though i have a couple of poly framed guns and they perform fine.
When it comes to ammo, IMO it is 9mm all the way hands down. The more I shoot other calibers, the more I like the 9mm. It costs close to half the price of the .40, is just as capable for self defense, shoots nicer, and you get higher capacities (though both are high). If you needed to penetrate barriers then the .40 would have a significant edge but for self defense the two rounds would be equals and for target shooting the 9mm is vastly superior.
Again, just my 2 cents.
597 VTR, because there's so many cans and so little time!