I'll be up in New England over the weekend, and I'm returning south Monday night via the overnight train that leaves South Station at 9:45 PM. I'll be returning my rental car at about 4:30, and I wonder what might be a good place to have a "typical" Boston dinner that withing walking or transit distance or even a short cab ride from South Station. I've been told that the North End is known for its Italian restaurants, and I wouldn't be adverse to lobster and other seafood, or just some really good cuisine of any type. While it doesn't have to be cheap, I'm not going to be dressed for any really fancy places. Any suggestions?