HATs will probably have the potential to sound the best of those, but IMO will require a little more effort than the others to reach full potential; unless you plan on going active right from the jump, which I think you said you do. (In that case also check into raw drivers from parts express or madisound)
Anywhooo, I know atleast one guy with each set of comps youre asking about and.....
From what some friends have told me about those Morels is that they like alot of power but when properly fed will get plenty loud and tons of midbass while still maintaining clarity.
The ID set, I was told was very clear and detailed he didnt comment on the midbass as much though.
The Imagine set, based on the review I was given, seems to be right in between the 2. Strong midbass, with great detail and clarity. But will probably be best if you keep them mounted coaxially. (Once again, unless active)
All of that said, I have never heard either set in person, which is why I recommend you go listen to some stuff. But what I can honestly say is that for the prices of those sets, I dont see myself buying a set of HAT Imagines $250 unless I've extensively listened to them. But thats just me //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif