Integrated advice for B&W 705's

Thanks for your replies! 
I did get a change to demo them prior to purchase but probably not long enough and with a wide enough range of music.  There are aspects of them I really like...very clear, nice midrange and better bass then my previous setup.  Also harsh maybe isn't the best description, perhaps a little too bright sounding is more accurate? Sorry still new too the whole audiophile scene and descriptions.    

I've have looked at the Rogue products and they look like they may be a good fit with the tube pre-amp.  I've also been looking at the ARCAM SA20 and Musical Fidelity M2Si based on pricing and seems like some positive reviews online, although I'm learning that getting thing paired well is very important and don't work well in all systems.  

Many love B&W speakers. I am not familiar with the model that you have, but any B&W that I have heard always sounded too bright for my taste. I doubt that replacing your amp will change the character of that speaker!

room treatment you'll probably get them to sound just the way you want too.

It will be hard to find an amp to tame the highs in your speaker.  I know you don’t want to hear this, but trying to tame the speakers is a band aid approach.  I would cut my losses and put the speakers up for sale. Then listen to different speakers and find one you really like with smooth highs. They should then sound fine with your Marantz.  I speak from experience as I had a pair of bright speakers and changed all the components in the system including cables. After wasting thousands upon thousands of dollars, I came to the realization to change the speakers.  Problem solved. 

stereo5"It will be hard to find an amp to tame the highs in your speaker."

It will be easy to improve the high frequency performance of you're speaker if you engage the support of a good dealer who is willing to loan you on approval an amplifier that he thinks might be better than you're Marantz which would not be hard to do! If you do not like the first loaner I would suggest, recommend, and encourage you to try another amplifier from you're dealer who should be willing to help you this is one of the basic roles of a true, expert, committed high fidelity dealer and this should be you're next steps rather than replacing you're speakers which is a substantial, significant, major step and irreversible.