Love my Singer 15-91. (Paid $80 in a cabinet with no attachments.) And love my Pfaff. I totally agree, I am also spoiled with the IDT.
My next machines will be a Singer 201-2 and a Juki 2010Q.
If you do go the vintage route I strongly recommend purchasing a walking foot, wished I bought mine much sooner. Found it cheaper online vs local store. Good luck!