That’s exactly what I do. Having all the music is essentially the same as having none of the music. I buy an album a month, usually (plus more on my birthday and at Christmas), and have my iPhone set up so that the music is the 32M of least-played music, plus anything rated 3 stars that I’ve not heard in two years, 4 stars that I’ve not heard in a year and 5 stars that I’ve not heard in six months. It gives me a nice mix of fresh tracks and favorites.