You have Newmar dealer now in Albany, NY at Albany RV (part of RVOne) and I believe there is another in Quebec which may be relatively near you.
It seems like a lot of Tiffin owners have to take their rigs back to Red Bay, AL for service. That's a very, very long haul from northern New England. I think it may be wise for you to check out the Tiffin RV forum for more info on Tiffins.
For us, our short list is the Dutch Star and the Entegra Anthem. Those two units seem to be pretty close. I would compare the Tiffin Phaeton more to the Newmar Ventana and the Entegra Aspire.
Have fun looking.