I would choose Penn if it were me. I interviewed at both and liked Penn better. I felt that the staff was more accommodating and it was a scholarly setting. I also felt a lot safer around the school in Philly than in Baltimore.
maryland! terps all day. oldest dental school in the country. ask hupholland about it. idk anybody at Penn but i know a couple at maryland who love it. i think its cheaper too even though you asked if $$$ wasn't an issue.