Vandersteen 5a, 15 years old vs. new Vandersteen Quatro Wood (upgrade or downgrade)


I currently have a Vandersteen 5A purchased about 15 years ago in great condition. My  equipment  is Thor 150 watt  tube EL-34 monoblocks with a Thor linestage, Sony SACD player and a middle of the road VPI turntable. Was reading about the Vandersteen Quatro Wood CT which I believe retails for $15,000.00. The wood has the carbon tweeter, my 5A's do not. The Quatro also has a 250 watt amplifier for the built in sub while my 5A's have a 400 watt amp.  If I purchased a new Quatro Wood and sold my 5a's would the resulting sound be better overall in my 8 1/2 by 15 foot room?
 My rationale for considering this upgrade, is that I would be getting a speaker with all new parts and would obtain a new warranty.  Any thoughts would be helpful.  In short is todays' Quatro Wood CT a better sounding speaker than my old 5A?  Would this change be an upgrade and would it yield an improvement in sound to justify the cost?

Thank you. 

M

128x128kjl1065
A firm grasp of the obvious is always helpful, 

where did the OP say it was an option to change the room ?

and owners of ANY speaker and Room combination would find the Vandersteen setup manual helpful for a math based placement of the acoustic center of a speaker, vs an arbitrary 3’

i hope to always be learning, I am sorry IF I have offended you in some way.
Also, any of the powered bass model Vandersteen can be run with high pass filter in place with the sub off - this approximate a super high quality mini monitor - dial in placement and imaging and then turn on and adjust the bass.

all in the manual, free download 
Greetings TomicI remember we were in a NY Hotel show in a pre-war building think Cement Bunker 18-inch steel girder going through the room with Vandersteen 5As ARC gear one of the rare times RV wasn't settled with measurements. We went out for a burger,fries10 min in says let's try one setting up, meaning changing the standard 100 Hz x over to120. then re-ran the in-room analog compensation settings after tweaking the contour Viola, I remember I went from shaking in boots to confident holy smokes playing the record 4-way street CSNY  Live and learn!
Best JohnnyR