Hi.. welcome... :)
It is very hard choosing a place to stay when there are so many to choose from and even harder if you do not know the city ..
Here is a link from pvnet that has a list of Hotels that may suit your family needs.. I am thinking of the ones with the European Plan...
http://www.puertovallarta.net/accommodations/index.php?numerorecord=30&ultimo=30&limit=30&option=&option2=&sortvalue=

Good luck with your search..I am sure there are others on the board that will be able to help you more..