I don't know the Boston Lynnfield's or the spl's you like, or the size of your room..but, I would Pass on the Pass, it's not a powerhouse amp for hard to drive speakers IMO. A used pair of Aragon mono's has much more power (not sure if the new Aragon's are the same amp?). How about the Pass-250, this may be more up to the job.
Dave
Dave