My husband and I are going out to dinner for my birthday. I'm hoping for input about the ambiance of the city's newer restaurants. Which is the most elegant spot that has opened in the past year or two - and which also has great food? The new place I've been to that best fits the criteria for me is Ostra, which I do like, but I'd ideally like to try somewhere new. Post 390 has been on my list of places to try for a while but I don't know if it fits the bill in terms of being elegant. Or maybe there's a new candidate in one of the hotels that is turning out top notch food? Or someplace else? We haven't eaten in the South End in a while and I haven't really been keeping up with any new candidates there.... TIA!