Efficient bookshelf speakers for my office

Hi everyone,

I'm thinking of putting together a simple office system with the Coincident Dynamo II and a pair of standmount speakers.  The Dynamo puts out 8 wpc, so I need a pretty efficient pair of speakers.  Only looking for bass down to 45HZ or so.  Tower speakers won't work due to the office setup.  Will sometimes crank it up a bit, but generally looking at listening at 75db or so.  Would welcome any recommendations.  Prefer a smoother, warmer speaker to a hyper-detailed one. 

Thanks for any advice you can offer.

Best, Scott