Passive Preamp for Atmaspheres?

Is anyone running a passive preamp with atmaspheres? I'm about to purchase an Atma s-30 and am trying to decide what preamp to purchase. My original plan was a good affordable preamp such as the Eastern Electric minimax or Juicymusic Merlin.

The rest of my system consists of an Arcam DV88p which I use for redbook cd playback, and Soliloquy 8.2s speakers, which are about 91db with 7.2 ohms minimum impedance. My listening room is relatively small at around 11 by 13 although it opens into a small dining area and kitchen which is separated by a 4 ft. high wall. I am currently using 18w/ch integrated monoblocks and generally play them at about 1 o'clock on the volume dial, so I don't think I need much power at all.

Any recommendations for passive preamps or am I still better off with an active pre?