Welcome to FT.

I live in and work here in Halifax. I would say the Delta Halifax is a good choice. It's connected by pedway to the Delta Barrington, Purdys Wharf, Casino Nova Scotia and the waterfront(Exit by the Mariott) You are only about a 3-4 minute walk from the Delta Halifax, down to the Mariott.

Just as an example, you can get the delta Halifax from August 9th to August 13th for $141/night. ( DELTA WEBSAVER http://websaver.deltahotels.com/?lang=en )

You are coming the same week as the Buskers Festival ( http://www.buskers.ca/ ) So hotels will book up quick. The festival draws people from all over and it's a great time! I enjoy it every time.

Instead of flying from Boston, have you considered driving? There is a state of the art ferry from Portland, Maine to Nova Scotia. It will be cheaper AND you won't have to pay to rent a car while in Halifax cause you can use your own. ( http://www.catferry.com/ )

Just wondering, you've mentioned you've been to Halifax a few times, why do you choose Halifax as a frequent destination place? I always like to know from an "outsiders" point of view.