time for amp upgrade

First, I would like to thank member for great advise from my last post. I have done some upgrade since my last post and it was a huge improvement. Now I think it is time for an amp upgrade. I am looking at following ss amps.

krell 300/400cx
levinson 432
pass labs x350.5
BAT VK600
Any other suggestions for well-matched systems would be appreciated.

current system
wadia 302
shunyata diamondback
audio research ls25 mk2
nordost red dawn xlr
krell showcase pre/pro
krell kav3250
adcom 5400
wilson sophia
transparent ultra mm s/c
wilson cub II(as center)
snell sr30 surround speakers
equitech 1.5q
shunyata python.