I came across 2 places, nearly across from one another, in downtown Lowell that are getting some good write-ups on Yelp.
Blue Taleh, 15 Kearney Sq (in old Lowell Sun building)
http://www.bluetalehlowell.com (under construction)
Etsogo, 16 Merrimack St. They do pan-Asian, with sushi, Chinese, Malaysian, and Thai.
I plan on trying both in the next couple of weeks. Has anyone heard of these places?