Troll thread or not: my Opinion.
I've owned it all in the high gain world. I've owned numerous 5150s, bogners, engls, splawn, VHT/Fryette, boogie, diezel etc. It really does come to tone preference, and what you want.
I just recently sold my Diezel herbert. I traded it in for an EBMM JPXI 7, because to ME, the guitar did more for me than the diezel ever did. The EBMM inspires me to play like no guitar I have ever picked up, and is the best guitar I have ever played. The hebert was not the "Best" amp I have ever played. I ran a stereo rig with a VHT UL, and a Diezel herbert. IT was mindblowing yes, but for the price, and what the herbert was being used for, I couldn't justify it financially. What did I put in my rack with the VHT UL to run in stereo now? My Trust old 5150/6505.
To me, the 5150s midrange and grind can not be beat. It is a great sound, and a REASON why it is used on damn near EVERY metal album of the last 10 years. Say what you want, but that holds alot of water in my book. These studios could be using everything else under the sun if they want. I know producers personally that may use a 5150 for something, or a herbert for something else, or a boogie for something else etc....It all goes into what YOU want for your sound. I love the 5150 sound, so I use it. I am a VHT/Fryette ultimate fanboy, so I use them. Do they cost more? sure. Are they the sound I hear in my head/the feel I want? Absolutely, and so is the 5150. I've owned it all, and I keep coming back to it for a reason.
The Diezel Herbert is a phenominal amp, but if it doesnt have the tone I want to the T, I'm not going to use it, especially not at the price. But that brings up another point. Diezels aren't 4 grand in Europe I believe, neither is Engl. But boogies over there are around that price, so you have to think about the economics of it all as well.
The herbert ( just an example) offers a TON more than the 5150 series will ever offer. Midi, 3 seperate loops ( one parallel, switchable, and another serial), 3 channels with different sets of EQ, seperates masters etc...They are not mass produced by any means etc. All of these things are reflective in price...It's up to you as the player to figure out what is important to you, and what is not. I loved all those features the herbert has, but at the end of the day, I couldn't justify live in my rack with my UL for what I use it for, and for the tone that it offers...I missed that grind of the 5150, and the organic natural tone it produces. Again, it all goes back to what YOU want and desire. Just because something is 45000000 dollars, does not mean it is better, I don't care what anyone says. Better made, better quality control etc, maybe...but again, the mass produced 5150 stuff must be doing something right, cuz I don't hear about 5150s failing that often, if ever, other than a tube issue. Another guy put it best....Dont follow the cork.