Gershman acoustics sonogram loud speaker or Tannoy NFM 8

[Rozeqloud]

I have recently came across a pair of Gershman acoustics sonogram loud speakers in mint condition for 1 ,000.00
 
Canadian ( im told 6 years ago they were over 5,000.00 )
 
I have recently been doing some upgrading , and here is my setup 
 
Simaudio 220i integrated amp / Simaudio 280-D DAC and Tannoy NFM 8 speakers 

(Not pertinent to this is my RSA darkstar and Sennheiser HD 800s )
 
Ive never heard these Gershmans , but they are over 20 years newer than my Tannoys .Which may by itself be
 
irrelevant 
 
What i love about my Tannoys is (excuse me being w/out professional audiophile language ) is their accuracy and
 
imaging , and when i have to listen to music low , they also are very accurate .
 
Im led to believe this will improve with the sonograms , and tho i thought the bass/low end was great on my Tannoys
 
, im told i will hear a huge improvement there as well 
 
1k dollars canadian , is nothing to scoff at , tho if they were originally 5K , and if they are a huge improvement over
 
my Tannoys , id welcome them 
 
Am i a fool to pass them up at that cost ? And is spending 1k worth the improvement (if it is so ) over my Tannoys ?
 
Im here for advice 
 
I ve been directed well from here before (Ie Simaudio 280-D is a dream ) .
 
Cheers