Hope someone can help me. My Northriver deserves good speakers have narrowed it down to these two choices Bose 131s will have to cut a hole in my boat Iv'e gotten over that they will mount in front of driver and passenger by knees. second choice 151s they will have wall mounts 151s are a 3 speaker arangement 131s are a 4" only. will the 131s carry enough sound and will the 151s have enough bass? Hope someone can help.