Hi Guys,
Very happy to report that ALL IS WELL !!!
Had to get some adjustments to the 'Passion Center' (I like to use that phrase as Music and Movies have always been much more than just 'entertainment')
Fortunately, believe it or not carpentry work was done just in time.. When I had called the dealer, I was told that the speakers were already on their way.
Got the 'installation' done quickly with the addition of new banana plugs (so far, was connecting the amp end of the cable directly)
and finally, the moment of bliss !!!
* The speakers sound fantabulous. The living room shape/acoustics are good for floorstanders too.
* The 'leap of faith' from zensor 5 to 7 (audition was possible with 5 only) worked out wonderfully.
* The speakers are very really musical. Bass is controlled and confident (& ample compared to bookshelfs

)
* MOST Important : Marantz amp with 45w can comfortably drive the speakers. No issue whatsoever. The volume is still kept typically between 9 to 10 o'clock and is still good enough.
* Some musical pieces, phrases are audible / clearer for the first time. Especially the lows and violin runs or soft background music is audible which was not so obvious previously.
* Vocals and separation of instrumentation is great.
So it is a 'wow' experience overall.
Guys, thanks again for your valuable inputs!
Cheers!!!
Some snaps: