I doubt that it's a power issue. I've been running mine with 12 wpc SET monoblocks for 5 years and they never sounded remotely like that. A friend is using another pair with the same amps. They should sound fast, open, detailed, and very involving. As to the Class D idea, I've tried two Class D amps with the Gallos and they both sucked all the life out of the system, but system synergy can be an elusive goal.
I'd start by replacing the speaker wire (I used to have Kimber 8TC) with something from Morrow Audio, but it sounds like a bigger problem than can be addressed with speaker wire. Do you have them well out into the room? They're superb speakers and worth your experimentation. Dave
PS You're not trying to bi-wire them are you? The lower pair of speaker inputs is NOT for bi-wiring.
I'd start by replacing the speaker wire (I used to have Kimber 8TC) with something from Morrow Audio, but it sounds like a bigger problem than can be addressed with speaker wire. Do you have them well out into the room? They're superb speakers and worth your experimentation. Dave
PS You're not trying to bi-wire them are you? The lower pair of speaker inputs is NOT for bi-wiring.