Glen:
     Why are you looking into the most radical procedures like Maze and AV node ablabion?  Why not consider PVA (pulmonary vein ablation).  Maze requires open heart surgery and a heart and lung machine, which carries it's own risks.  AV node ablation would make you 100% pacemaker dependant.  However, if it were me and those two were the choices, I would have the AV node ablation since you already have a pacemaker.
    The hospital you asked about (Seaton Hospital, Austin) has no listing among the top 50.  The Texas centers listed are:  
     Texas Heart Institute at ST Luke's Episcopal Hospital in Houston (#8)
     Methodist Hospital, Houston (#15)
     Parkland Memorial Hospital, Dallas (#24)
     Glen, have you ever tried any invasive procedures to rid yourself of your afib?
     I also heart a nightmare, unbelievable horror story from Ft. Worth, Texas.  I would stay out of Ft. Worth.
     Keep us posted
Pam