How about adding a phono preamp review section? You have reviews of turntables and Tonearms. A Phono Pre section only makes sense. After all, how is one going to play the turntable he reviews without one?
Actually these slot into the Preamp category - sometimes being known as pre-preamps. I use one myself because my own preamps' phono section(s) gave up the ghost. The replacment proved to be more pleasing if not technically superior. So if one looked for the NAD PP2 for example, you should be able to find it under preamps.