Huge T+A fan and I enjoyed everything of theirs I have ever heard. I'll also agree with the above posts that this seems like a gamble for what could be a pretty minimal improvement.
There are many other great options for amps outside the class D realm. Is there a reason you aren't exploring those many products? I know some people have issues with heat, power draw, size, whatever, but you didn't mention your reasoning or if you really are stuck on class D completely. I don't hate class D at all, just feel you might be limiting yourself by only looking in that direction.