Pastrami On Wry is definitely good (love those parmesan fries) but somewhat of a different type of food. Sinnamon and Brass Key are more diner-ish stuff. Landmark is a horrible pit, unless it has changed immensely in the last couple years.
Joe Sinnamon does a great breakfast (and lunch) but the BEST breakfast in Manchester (CT) is to be found at the Cosmic Omelette. Quality ingredients, interesting combinations, consistant, reasonably priced, good stuff!
I had lunch there a few times when I worked on Main Street in Manchester. Honestly, it's not that good, and a little pricier than you might expect for the quality. Brass Key right up the road has better food and value.