I am in the process of selecting a new sewing machine and have narrowed it down to the Viking Lily 535 and the Bernina Activa 135. Other than the slight difference in price, has anyone had occasion to compare these two machines? I am particularly interested in the difference in the automatic buttonhole features and in overall maintenance and performance. Any help would be appreciated. I currently have a Viking 5530 that is 25+ yrs. old and has gone above and beyond the call of duty.