A group of 6 of us needs to have dinner somewhere between Arlington St. and the Hynes Convention Center midweek. Looking for interesting flavorful food. We don't know Boston at all. I thought of the Summer Shack, which I know by reputation and from walking by it. It's the only place I even know by name in the area. Is that a good option? Why or why not? Can we do better? Looking for under $40 per person. Chowhound's always been an excellent source, and I always try to give back in areas that I know...so please steer us well! Thanks.