Please help me treat my grandparents to a great meal as a thank you for their support over the years.

My grandparents have footed the bill as a gift to my husband and I while we're vacationing in Ireland. We keep trying to pick up things like parking and meals to help pay them back while we're here, but I'd really like to wow them tomorrow with an excellent dining experience. I'm looking for recommendations from the people who know the city best for an amazing dinner for four with a budget of about $40-60 per person. I'm looking for something not too abstract as far as flavors, maybe some Italian flair since we vacationed there together before as well. We're here Thurs and Friday night, but I'm hoping to take them out tomorrow, which I realize is last minute but I appreciate the help! Everywhere you look online is just an ad for something ultimately, so I'd love to hear from locals.

I'm editing because I forgot to include that my grandpa has a sesame seed allergy. I'm super impressed by all the menus we've seen so far where you guys utilize a numeric system that makes it clear what he can't eat! We haven't been anywhere in the US that makes it that easy.