The sophomores don't really live on upper, they live on college road. To get to the dorms on upper, you have to walk up a whole other set of stairs going past the three sophomore dorms that are on college road (get used to walking up and down lots of stairs!)
The rooms at BC are a good size compared to some of the other rooms I've seen at other colleges, but some doubles are smaller than others (just the luck of the draw I guess). There's really not much extra room for more furniture, but you could always bring up the chair and see if you can find some place to put it if you really want it.
I suggest bringing your own fridge and microwave, but you don't have to if you feel like you won't use them. I know I couldn't live without microwave popcorn.
