If I may, I see a bit of a fallacy here developing here when it comes to using professional products as a basis. When Bob says nobody knows what High End should sound like, the same can be said about professional monitors. When we talk about two way professional monitors you'll find as dizzying an array of professional monitor options as you would for the home. Perhaps not as many choices, but surely more than enough to drive anyone in a hurry to choose just one quite batty. If all pro monitors were true to the source, they would all sound the same. Well, they don't. To make a loudspeaker category e.g. Professional Monitors the standard that category must have a standard of it's own.
Many commercial studios will have a choice of nearfields for non-house engineers to choose from and studios with more than one house engineer will likely have a monitor for each. One might like say a Genelec and the other a KRK, someone visiting might be more partial to Tannoys and another old Haflers. They could all be 1" tweeter, 8" woofer, actively bi-amped and acoustically suspended. The question is, why? The answer might be a bit surprising because we have to go a step past preference to the reason for the preference. That next step would be familiarity. After all, an engineer's job isn't just to record and mix and master as faithfully as possible, like it or not the biggest priority is to to do so in a manner that the final output will translate well to the final user, wherever he may be and whatever he might be listening to it through. To do that, you've got to know what every piece of gear you use, adds or subtracts and that begins with what you hear, your monitors, and goes back the chain all the way back to your microphones. In other words, accept the fact no monitor is perfect, suck it up, commit to what you can work on for hours and day at a time and commit to it.
Now I apologize if I'm coming off as a bit authoritative here. For context some of you know I've had both feet in the trenches of both worlds. What even fewer of you know is that we are part owners of a media network that does movies, television, television and radio commercials, music , radio shows for AM and FM and own and maintain the broadcast infrastructure. No, this does not make me an expert by any stretch. It does mean, we hire them. It also means we have to know what they require and know the difference between what is required and what is plain capricious. We are a publicly listed company, stockholders do not like capricious behavior.
This brings me back to familiarity. I am very saddened every time I see people switch equipment frequently. I think that too many people hope to get miraculous results just by changing a piece of kit, so much so that they DO hear miracles and sadly a few days later the gains turn out to be small ones if ever and instead of being able to properly appreciate the gains, it comes invariably with a sense of disappointment. Well, I've been there, I think we all have one time or another. To avoid this all that's really needed is patience and a healthy but non-paralyzing dose of cynicism.