Krungsri (yellow bank) or Kasikorn are better banks and you will need a residence certificate form from immigration to be able to open one. good idea to have several passport sized pics to hand, you will need them.
My Wife is a Filipina too and I am British, the way we did it was for me to get my retirement visa and my wife had a student visa to learn Thai, once she finished her visa which was 6 months she was allowed to 'follow' me on my retirement visa, best thing to do is speak to these people here, they was very helpful.