Boston has a lot to offer. One to avoid is Tera.
Excellence: Natalia, Justina, Marcella, Jill are all on eros-boston.com, Nicole (greyed eyed), Ashley (sensual mistress), Ann (touched by an angel),
Nicholette http://www.angelfire.com/ego2/nicholette (definately earth shattering hot). All have very limited schedules and can be reached for the most part by email or by telephone. These ladies are all excellent. Very high ratings for reviews and all is offered with a smile. Again just see their reviews.
Just my .02cents.