I have an SW99 I like pretty well, but I wouldn't want a DAO version due to the long, odd trigger pull. I've also got an old S&W 9mm (M59) that's a good gun. I'd probably go with the S&W if I had to pick between the two you mentioned. But I'd much rather have a CZ-75 for roughly the same price (or less) than either of them. I really like the CZ-75 compact PCR (compact alloy frame model).
I've heard the EAA Witness pistols are also pretty good (though I don't have experience with them). I think, especially for a beginner, you will be frustrated trying to hit what you shoot at with a DAO pistol. I have several of them (Kel-tecs) that I like for their light weight and compactness, but I consider them very close range self-defense guns - not a lot of fun to shoot.
Doug