Only you know what features and floorplan(s) work best for your family. For instance, our 212QBW is perfect for just the two of us and the pooch. No slide, not terribly heavy or long. But it wouldn’t work for a family or a pack of grandkids.
Once you zero in on ones you like, you might want to re-post here asking for thoughts on those specific models. As for build quality, the same model can vary greatly depending on where/by whom/when it was built. Yeah, there seemed to be quality issues during Covid but those may be over.
The most important thing is to do a thorough PDI when you buy, new or used, to ensure nothing is faulty. A search here will turn up some excellent checklists to go by when you’re ready to pull the trigger. Good luck!