I've just started looking too, I live north of Boston and have been to Davids and a few shops , But I just went to this small shop in Tyngsboro, the lady was really nice and helpfull, no attitude. Some of the places I've been they've been downright rude. Anyway she's a New, and Once worn shop and she's having a $99 gown sale, you should check her out...Sew Special Boutique in Tyngsboro,
I'm a big fan of Judy's in Quincy. I actually bought my dress at David's in Attleboro, but Judy did my alterations. She's fanatstic -- I probably would have bought my dress from her if I'd found her before I bought mine.
I went to David's in Danvers to try on dresses for the first time. But I bought my dress from Bella Serra Bridal in Danvers. They were wonderful. I bought a sample and they helped me pack it to ship it to Hawaii when I moved. I visited the dress with people a few times in the 7 months that they held it for me. I highly recommend them.