I love my 4Jrs with the Parsound JC-1 Halos. I've tried the VTL 450s and the Innersound ESL 300 as well as the Pass Aleph 2s and a Linn Classik. I think the Jrs like some power and the more the better. I tried an Ayre V5xe a short time ago and while everything sounded great, there was a definate sense of loss of power and a penalty in dynamics. I would look at the amps with good power first.
I thought I was a tube guy, but these speakers sound so good in my all solid state setup that I've forgotten that I needed tubes to be happy.