The Animal Kingdom Lodge and the Wilderness Lodge are the least expensive of the Deluxes. Both are gorgeous. AKL is right around the corner from the Animal Kingdom and WL is across the lake from the Magic Kingdom.
After that, the Epcot area resorts are the next least expensive, and tend to be the same across the board. The Beach Club is where Cape May Cafe is. You can walk between all of them and to/from Epcot & Hollywood Studios.
The Contemporary resort is the least expensive of the monorail resorts. Then the Poly, and the Grand Floridian as the most expensive of all the resorts on the property.
Sometimes good deals can be gotten at the
DVC resort, but the most likely are Saratoga Springs and Old Key West.
Value season is definitely the best time to get good deals at any of the resorts and actually our stay at CBR only ended up costing a bit less per night than our stay at AKL, because of the seasons and the discount we ended up getting. (Both were around $140/night)
We loved our stay at AKL, and even being in a pool view room, we didn't notice much noise. We were on the 4th floor which kept us from being too close to the ground and away from the lobby on the 3rd floor.
Honestly, I think you will do fine at any of the Deluxe or Mods as long as you put a request in to be away from the main areas (no rooms off the lobby). Pick something that fits your budget, and I doubt you'll end up unhappy.