We stayed in room 555 and had a great view of Epcot. That was a studio, though, and I'm not sure if that's the type of room you have booked. As for the service road, I didn't even know it was there -- it never bothered us and wasn't noisy at all.
If I remember correctly there may be two different roads that we're referring to. There are rooms at BCV that face out towards Epcot Resorts Boulevard, and there are rooms that are facing a service road area for the resort.
This past November my parents ended up in a room that faced out towards Epcot Resorts Boulevard. They told me that they didn't really notice the noise all that much. If you were a light sleeper, the noise might be a bother until you were used to it. As far as the service road area, I cannot speak from experience.
If you have your heart set on an Epcot view room, although technically there are no longer any Epcot views according to the resort, see what your room looks like when you get there. If it doesn't meet your expectations, make a request to be moved.
Also, check out this thread. It's a description of the resort that one of our more informed BCV experts has developed.