Integrated Amplifier for the PSB Synchrony One B (bookshelf)

Besides the NAD which Integrated Amplifier would sound good (better, more open and detailed) with the PSB Synchrony One B bookshelf speakers.
Also, which stands height I should go with since the mid/bass is on the top.
I have Sound Anchor stands (25") and in my sitting position my ears are in the level with the mid/bass cones
so 26" or 27" would make sense but I am just concern about the bass quality if I place the speakers higher.
Thank you in advance on your opinions.