Small Speakers for Berning Microzotl?

I'd like to get a pair of small speakers, like desktop or monitor size, for my office. I'll drive them with a Berning Microzotl 3 watt tube integrated amp. I'm thinking they need to be a minimum of 8ohms and 92db efficient. What do you think would be the minimum efficiency (for low volume)?

So far, it looks like the Zu, WLM Diva or Reference 3a speakers might work? I'd love to hear any comments on these and/or any others you might suggest.

Thanks, Jeff
Take a look at Decware, they have a bookshelf speaker that can be run with 2 watts. $700.00 And don't forget Omega or Galante there are some on the GON right now.