I can't speak to the 40.2's but I owned 30.2 XDs and now have 40.3 XDs. I drive them with a T+A PA 3100HV integrated and they sound great.
I've had the T+A for about 7 months now and it never gets boring or fatiguing. (I had a BAT VK 3500 before the T+A it it was just OK with the 40's.)
While I enjoyed several tube amps with the small Harbeth's, the 40's absolutely need big powerful SS amplification.
I'm guessing your amps would drive them really nicely.
My experience with other brands is limited but if your music preferences matches what Harbeth's are renowned for, I think you will be happy with them.