Which integrated Amp for Vandersteen 2ce Sig2 ?

Am currently using a Marantz PM15S1 to drive these speakers - very bright, airy, detailed BUT thin and once its gets into symphony / orchestra music, its messy. Otherwise, for simple femalevocals and jazz, its beautiful.

Hv auditioned the below

- Ayre 7xe
- BAT vx300
- Marantz PM11S1
- NAD M3
- Luxman L-590u Class A
- Musical Fidelity A5.5
- Musical Fidelity A1

Price increase simply cannot justify the sound improvement....am now looking at the below -

Pass Labs int-150
Gryphon Diablo
Luxman L-590u

Any comments ....