While I agree with the premise of "I hear what they hear" ... many of you know that I am a huge fan of on board speakers to bring the experience right into my face. There's a big difference in hearing something from a few feet away as opposed to a few inches away. Personal monitors are very important to me, and I love being able to adjust the volume of the room, and leave MY volume where I like it. Just another viewpoint.
If I had to monitor the Compact alone, I think I'd find myself playing louder than normal.