Coda 07X vs Backert Rhumba extreme vs VAC renaissance V


Hi all, I am making a major changes in my system. I have always been using SS and am changing from SS integrated to separates. I have always loved class A and now want to get flavor of tubes (for their 3D like holographic sound). My amp (which will arrive soon) is Audia Flight strumento no.4 mk2. The input impedance for this amp is rated as 7,5 kOhm. 
Based on some research, I have narrowed down to above three pre-amps and would like to keep budget < 6K (Ok being used). My inclination is to go for Backert or VAC, but have heard people talking about Coda 07x, being a SS, is very tube like. Has anybody compared or listened to these ?. I know there is always a flavor of sound being subjective and it is best to audition first. But I have busy schedule and for the first time, want to make purchase without auditioning. 
romney80
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Yes, I was a bit concerned about low input impedance of my amp, but again with 150-300 ohm output impedance of vac, the ratio of 25-50:1 was right were it needs to be and hence pulled the trigger. 
@romney80 & @tvad I stupidly responded before making it to the end of the thread and didn't notice the purchase decision. Congrats! 

And please do post back with your impressions. I've always wanted to hear VAC gear. Used to be particularly interested in back when I had Thiel speakers... heard some very positive reports of the combination.
Excellent choice.  The VAC will have no issue with you amp’s impedance.  I have the Renaissance V and it is an excellent piece driving my Ayre VX5.  You can do some substituting of the 6922 tubes and enjoy different subtle changes, but VAC has voiced it well with the factory supplied new production tubes.  
Thanks for all the input. I have heard only good things about vac. This will be my first jump into tubes. I will see how the stock tubes work and might try some others eventually. drrsutliff. What other tubes have you tried ?