I have to say that, while I love Mannys, I wouldn't consider it to fall into the catgeory of either cheap or quick - but maybe that's just me

I wouldn't put Longhorn Steakhouse or Bahama Breeze into those categories either (certainly not cheap).
We have only ever tried Golden Corral for lunch and it was awful but neither of us are fans of buffet places particularly (I know some do like them). Lots of cheap and cheerful options and if you don't mind a bit of a drive, Friendly's on I-Drive is fabulous. Bob Evans is another favourite of ours.