Agreed. That is why I consider getting a Synergy system only if I can cover the 3 major tube amp types, plus multiple cab configurations. A lot of the "they all start to sound really similar" effect has to do with the way video demos are done. Most of the demos are done with the gain set at 5 or higher. Gain set at 7 or higher is more common than gain set at 5. The differences in sound with preamps are more prevalent at lower gain to my ears. Yes at higher gain levels there are differences, but I think they are more subtle. I also think demos almost entirely ignore guitar pickup volume and tone as a factor in demonstrating the actual differences between preamps. I believe that demos done with lower gain, where the pickup volume and tone is varied will better show off these differences. And when did you last see a demo with a Synergy system that didn't use a 6L6 tube based amp? Have you ever seen a Synergy with an EL84 based amp? I have a Mesa 20/20 EL84 stereo tube amp, a Mesa Recto recording preamp and a clone of a Fender Blackface AB763 preamp (channel 1 of a Bandmaster or Bassman). I also own a 68 Bandmaster head. It is cosmetically a drip edge Silverface. But it is actually a Blackface. I got lucky. The original owner didn't know what he had. The Mesa Recto Pre sounds quite different feeding the 20/20 than the Blackface clone. And the clone + 20/20 combination sounds very different than the Bandmaster head. All with the same cabs, by the way. I can push the clone to overdrive to get a similar sound as the Mesa pre with the gain up, both driving the 20/20 and a Mesa 1 x 10 cab. But even driven hard, the clone + 20/20 won't sound like the Bandmaster head when it is driven hard. It is a bit sweeter. Note that since the Bandmaster has no serial effects loop, I cannot feed the clone into the head's 6L6 tube amp. Nor can I use the Recto Pre with the Bandmaster's amp section. So would a Plexi module sound like a real Plexi driving a 6L6 amp? Probably close, but no cigar. What about a Plexi module driving an EL34 amp? Probably really close. Add a 1960A cab and most would find it hard to tell the difference between the module and the vintage amp. I think a modular system of tube amps, preamps and cabs as a way to get really close to the sound of multiple vintage amps, without the incredible cost. My Dad had a 1970 Barracuda convertible. He paid around $3700 for it. It came with a 318, the base engine. Today, if you dropped a factory crate Hemi into it, added some scoops and stripes and upgraded the drive train, you'd have a very good 70 Hemi 'Cuda clone that would sell for north of $150,000. I think of a Synergy T/DLX module, and a 6L6 amp with a Jensen Vintage Replacement C12N as similar to that Hemi 'Cuda clone.