I didnt realize that the Marantz was only 30wpc. I would be looking at some efficient speakers. Forget about the Monitor audio's. They like power, so do B&W's and dynaudio.

I would give these a listen http://www.psbspeakers.com/products/...e-B6-Bookshelf

Or check here for last years PSB image models the B-15 and B-25 The recommended minimum power for the B-25 is 10wpc and should be a good match for that marantz.

http://www.saturdayaudio.com/ The B-25's are a bargain at this price!

http://stereophile.com/standloudspeakers/1204psb/

Or look to some Paradigms as mentioned above.