I would get the GE first before its sold out otherwise you will be paying more that $149 on the secondary market. I have all the modulars except the first 2. Built PR first and worked backwards. Even though the earlier models are not as detailed, I still like the look of them and glad I bought them all. Surprisingly, the Town Hall is better than i thought it would be as it's not discussed as much as the others. I love the columns and detail of the building of the town hall. Each modular is unique and a lot of fun to build.
I also have the Horizon Express train with power functions in my lego city. I love the train, that is the first thing I show off. Turn the lights on and around the track she goes! Pretty cool..