Re: PS3 or wii?
With a 3yo and a 5yo in the house, deffo a wii. Better and cheaper games for kids and if your husband is not a gamer, per se, it will probably be enough to keep him entertained, too.
I'm not what you would call a gamer but I do enjoy a few wii games. Mainly Super Mariokart online with mates from all over the place at about 2am when we're all pished.
Have mates as far apart as Spain and Doncaster who all get together for tournaments now and then.
Can't stand all this toy soldiers cack, like C.O.D, like.