Well, personally I've been considering both VM and JVM a couple of times.
The first time I ended up with a 65amps Lil' Elvis (that will stay with me until I'm left with no choice but to depart with it), but I swore that I will have a VM once while the JVM was forgotten.
A year after I didn't remember what the fuzz was about and I wanted a second amp... started with the Blackstar HT-5 but found that for a little more money I could get a little better... kept thinking this until I found that I've increased my budget so much, that I could go for a VM... or maybe the JVM was good as well??? and I learned of the AFD100. All within approximately the same price range.
Still waiting for the AFD to arrive, the local guitar store didn't have a VM in the shop, but I tested the JVM. I agree... it is extremely versatile and it does sound good, but there is no such thing as a all-in-one amp (maybe the Audio FX-Ultra... I don't know?). Then the shop got a 2266C in the store... which I tried. It took a bit of trying, but I eventually found both that Marshall overdriven sound I've been looking for... but also a nice crunched clean I hoped one day a Fender amp could do... you know... Fenderish clean with a bit of Marshall crunch. Absolutely stunning... the sound melted in my ears and therefore I don't believe I'll purchase the AFD, but I will try it out since I'm given the opportunity to before making a final decision. If I buy the AFD100 it only means that I'll buy the VM later...
The drawback of the VM is that LDR vs. HDR sound level and that it can't be set individually...
In my honest/humble opinion the JVM have made a bit of compromise with the sound in order for it to be extremely versatile and it did sound a bit sterile.
I'll explain. For an amp to appeal to me I need to like the sound and I need it to give me some feedback on how I am playing. Now VM don't forgive my mistakes... it'll broadcast my mistakes to anyone within hearing range... just like with my Lil' Elvis. And if I play well on the VM... then I get a sensation of mastering the guitar...a rush sort of speak. Could be slightly compared with when you finally nail that guitar solo you've been trying to learn. The JVM however... with that one I can easier hide my technical limitations. I can speed up my picking technique and it sounds like on top of things. It really doesn't give me any feedback on my playing at all...unless I really screw up (playing wrong chord or out of tune or something).. that is why I experience it as a bit sterile and it is how I experience it. It was fun though...
Mind you that I'm not looking for some high gain metal stuff, but more juicy gain and possibly a nice subtle crunched clean that have that distinct Marshall signature ringing out of the speakers.
Still, I admit that you may be able to fool me with a blind test between the JVM and the VM... but not with me playing... unless you are really mean when tweaking the settings of course.
I am definitely a gear whore (picky about my sound) seeking my optimal sound and using a lot more time seeking that sound... time that maybe I should have used practicing the guitar. I think that I somewhere back in a malfunctioning part of my head I believe that with better sound I'll make better songs and get rich on royalties one day.
I wish there was a Marshall that had the power attenuation that comes with the YJM and AFD, while having the possibilities of saving your settings on the pedal that comes with the amp like on the JVM... that sounded like the VM. An amp like that I would pre-order the minute it was available... ANYONE AT MARSHALL AMPLIFICATION HEARING THIS???
If you do... I will allow you to call it the Marshall JK100, Jk Signature 100W head... and put me down for the first run
And Chukka... if the JVM floats your boat... then congratulations. I truly hope it's a keeper.
Hope you don't take this as slagging the JVM... I really didn't... just wanted to say something about the user experience AND give Marshall inspiration to make the JK100