You know the answer, right? Maybe when they are smaller, but risky. Grey grows on you like a Niger, convict tang, french angelfish, etc - the patterns are kinda like an adult chevron. They do get huge. The big issue with any of these is that you have nowhere to go with them... nobody will want them and you cannot give them to a larger tank, restaurant display or public aquarium like you can a queen angel, valmingi, etc. If the queen or rough just gets big and kills all of your other fish, are you OK with a 1100 gallon one-fish tank? If not, then I would not get one.
You basically are stuck, or you can grill them and have a triggerfish sandwich. This is crude, but it has been done.
You can get either. There are any number of divers in the gulf who will get you one if you ask, pay and wait.
Definitely not doing the Grey. Might not risk it for the Rough.
Had a Golden Heart that was taken out by a parasite, got my hands on a Queen that the same parasite took out.
Backup plan is a Golden Heart. Trying to get a Queen or GH as Juvi as possible. I've had a Juvi Titan in my 230 for a bit now.