I'm in the same boat and I'm either going with ionic 5 or 6, just worried about Hyundai panel vibration. I'm owned two Hyundai vehicles now and they always have interior rattles here and there, but engine noise helps reduce how noticeable they are. On the EVs, there is a much lower noise floor, so rattles will likely drive someone (me) crazy.
I really want the 6, but since it had a very small trunk, I'm not too sure how practical that is consider I want to use it for trips to wholesale stores.