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
@romney80 Not trying to make any money or anything... I've got 3 matched Amperex 6922 white label/grey plates and 2 matched Amperex 7302 white label US factory tubes (60's vintage).  I got them for my Audio Mirror Tubadour III-SE, but ended up sticking with the stock miniature 5977 tube pairs.  Just good, rare tubes sitting around gathering dust, I only put maybe 10 hours on both sets.  I've been too lazy to get around to selling, so message me if you start going down the 6922 rabbit hole and want to try out some of these NOS vintages.  
Just to update. I hooked up VAC Renaissance mK V to AF instrument no.4 mk 2 feeding Aerial acoustics 7T and 2 REL S5/SHOs. Upstream is Luxman D-10 X fed by antipodes CX/S30. I have listened for many hours and tried almost all genres. I am very happy and thrilled with this tube pre-amp. Very musical and not at all harsh even at loud volumes. There is something magical about tubes and the mids, which makes the vocal sound melodious and very pleasant. I don't expect dynamic slam as you get from full SS, but the combination of SS amp with tube pre-amp gives the best of both worlds and so far I have all the dynamic punch as much as I want. The strumento no4 mk2 is one amazing killer amp. I love this combo and will easily live it for long. I think everybody needs tubes in their chain (amp or preamp or DAC) to get best out of music. 
Great outcome, exactly what you hope to hear when people get new gear. Tube pre and ss amp is my solution too. Congrats!