Recommendations Wanted

One thing that would help the respondents is to know what it is in your current speakers/system you define as deficient.  Without that, we're shooting in the dark with respect to recommendations.  (In general, though, 40wpc is pretty weak for most B&W's.)

I can't believe you are listening to music 7 feet away from your speakers?

+1 on the Tekton Moab recommendation

My amp is a hybrid, tube/solid state, PS Audio M1200

MC hit all the constraints and compromises, build time delay and they are big speakers

Worth the wait and unrivaled price performance IMHO 

There is nothing wrong about those beautiful 40 watts (more like 65) from your mc240. Just complimenting your system. 

Hello thermionicemission.  Happpy Holidays!  Please understand that we are all at the mercy of the recording engineer who provided us with whatever recordings we play. The fact that your system sounds great with some music, but not with others is proof that it's telling you the truth. Please remember that 400 watts is only 10 db louder than your 40 watts. It's how easily an amp can produce the power you normally use that matters. With inefficient speakers, 40 watts may not be enough. But, most speakers are in the 86 - 92 db range of sensitivity and 40- 60 watts is plenty unless you are trying to annoy the neighbors. Most of us listen at between 0.5 and 5 watts. A 20 db higher peak requires 50 to 500 watts! Is that news? Try some recordings of music you like that get excellent reviews. Do they sound great? If they do, your system is working well. Better recordings are cheaper than new electronics. I've got a lot of old recordings. Lots of stuff recorded off the air. Some of it sounds poor, but I like the music or the performance. I can overlook the "sound" because I like the material. When your sweetie has a cold, you still want to hear her voice, yes? Keep smiling! Enjoy the music.