Right speakers for Marantz PM8000 + Marantz CD67-OSE?

Hi everyone,
I'm a new member of diyAudio, not an audio expert at all but an audio lover, in search of suggestions about the right speakers choice for my stereo set-up...
I own Marantz PM8000 95W-Amplifier + Marantz CD67-OSE CD Player + Boston VR3 tower speakers (back bass-reflex port).
The Marantz machines have common peculiarities: warm, balanced and detailed sound, but a bit lacking in rhythm and quite sounding too much on the dark side...moreover ... too much bass and lacking midrange, so I thought to change my Boston speakers in a 2-way - front bass-reflex - bookshelf speakers, such as

B&W DM602 S3;
WHARFEDALE DIAMOND 9.3;
DAVIS CESAR ARRIERE ...

or in a 2/3-way - front bass-reflex - floorstanders, such as

WHARFEDALE DIAMOND 8.4;
DAVIS various tower speakers...;
B&W DM604 S3 ...

or in hand-made models featuring i.e.: Morel tweeter + Audax/Davis Mid-Bass driver...)...

I accept ANY KIND of suggestion...thanks in advance!