Upgrade questions: B&W N803 vs ML Ascent ?

I am ready to replace my Polk LS90 speakers which have served me well for 6 years. I am considering the N803 or the Ascents though I am not sure which one best serves my needs. Additionally, I am willing to consider other speakers. I listen to 40/60 music/movies. Listening prefenences include Bob Marley, Sarah Vaughn, Miles Davis, etc. My room size is 23x12 inches and the related components are as follows : Aragon Soundstage, bryston 4 BST, Aragon 8008x3, Anthem CD-1 and Audioquest cabling.

Any feedback or suggestions will be greatly appreciated.

Thanks

Mike